diff --git a/Array/Group.java b/Array/Group.java
index c4fda08..4ffd8eb 100644
--- a/Array/Group.java
+++ b/Array/Group.java
@@ -1,13 +1,12 @@
 package org.poopki.duckdns.user_db.Array;
 
-import java.util.Collections;
-import java.util.List;
-import java.util.ArrayList;
-import java.util.UUID;
+import java.util.*;
 
 public class Group {
     private String m_Name;
     private List<UUID> m_MemberList = new ArrayList<>();
+    public List<String> TechList = Arrays.asList("agriculture","pottery","animal_husbandry","archery","mining","sailing","calendar","writing","trapping","wheel","masonry","bronze","optics","horseback","mathematics","construction","philosophy","drama","currency","engineering","iron_working","theology","civil_service","guilds","metal_casting","compass","education","chivalry","machinery","physics","steel","astronomy","acoustics","banking","printing_press","gunpowder","navigation","architecture","economics","metallurgy","chemistry","archaeology","scientific_theory","industrialization","rifling","military_science","fertilizer","biology","electricity","steam_power","dynamite","refrigeration","radio","flight","railroad","plastics","electronics","ballistics","combustion","penicillin","atomic_theory","radar","combined_arms","ecology","nuclear_fission","rocketry","computers","telecommunications","mobile_tactics","advanced_ballistics","satellites","robotics","lasers","the_internet","globalization","particle_physics","nuclear_fusion","nanotechnology","stealth");
+    public Map<String, Integer> m_TechStat = new HashMap<String, Integer>();
     UUID ZERO_UUID = UUID.fromString("00000000-0000-0000-0000-000000000000");
     int MAX_FARM_NUM = 10;
 
@@ -17,6 +16,7 @@ public class Group {
             m_MemberList.add(index,key);
             index++;
         }
+        InitTechTree();
         m_Name = Name;
     }
 
@@ -49,4 +49,93 @@ public class Group {
             return false;
         }
     }
+
+    public void InitTechTree(){
+        m_TechStat.put("agriculture",0);
+        m_TechStat.put("pottery",0);
+        m_TechStat.put("animal_husbandry",0);
+        m_TechStat.put("archery",0);
+        m_TechStat.put("mining",0);
+        m_TechStat.put("sailing",0);
+        m_TechStat.put("calendar",0);
+        m_TechStat.put("writing",0);
+        m_TechStat.put("trapping",0);
+        m_TechStat.put("wheel",0);
+        m_TechStat.put("masonry",0);
+        m_TechStat.put("bronze",0);
+        m_TechStat.put("optics",0);
+        m_TechStat.put("horseback",0);
+        m_TechStat.put("mathematics",0);
+        m_TechStat.put("construction",0);
+        m_TechStat.put("philosophy",0);
+        m_TechStat.put("drama",0);
+        m_TechStat.put("currency",0);
+        m_TechStat.put("engineering",0);
+        m_TechStat.put("iron_working",0);
+        m_TechStat.put("theology",0);
+        m_TechStat.put("civil_service",0);
+        m_TechStat.put("guilds",0);
+        m_TechStat.put("metal_casting",0);
+        m_TechStat.put("compass",0);
+        m_TechStat.put("education",0);
+        m_TechStat.put("chivalry",0);
+        m_TechStat.put("machinery",0);
+        m_TechStat.put("physics",0);
+        m_TechStat.put("steel",0);
+        m_TechStat.put("astronomy",0);
+        m_TechStat.put("acoustics",0);
+        m_TechStat.put("banking",0);
+        m_TechStat.put("printing_press",0);
+        m_TechStat.put("gunpowder",0);
+        m_TechStat.put("navigation",0);
+        m_TechStat.put("architecture",0);
+        m_TechStat.put("economics",0);
+        m_TechStat.put("metallurgy",0);
+        m_TechStat.put("chemistry",0);
+        m_TechStat.put("archaeology",0);
+        m_TechStat.put("scientific_theory",0);
+        m_TechStat.put("industrialization",0);
+        m_TechStat.put("rifling",0);
+        m_TechStat.put("military_science",0);
+        m_TechStat.put("fertilizer",0);
+        m_TechStat.put("biology",0);
+        m_TechStat.put("electricity",0);
+        m_TechStat.put("steam_power",0);
+        m_TechStat.put("dynamite",0);
+        m_TechStat.put("refrigeration",0);
+        m_TechStat.put("radio",0);
+        m_TechStat.put("flight",0);
+        m_TechStat.put("railroad",0);
+        m_TechStat.put("plastics",0);
+        m_TechStat.put("electronics",0);
+        m_TechStat.put("ballistics",0);
+        m_TechStat.put("combustion",0);
+        m_TechStat.put("penicillin",0);
+        m_TechStat.put("atomic_theory",0);
+        m_TechStat.put("radar",0);
+        m_TechStat.put("combined_arms",0);
+        m_TechStat.put("ecology",0);
+        m_TechStat.put("nuclear_fission",0);
+        m_TechStat.put("rocketry",0);
+        m_TechStat.put("computers",0);
+        m_TechStat.put("telecommunications",0);
+        m_TechStat.put("mobile_tactics",0);
+        m_TechStat.put("advanced_ballistics",0);
+        m_TechStat.put("satellites",0);
+        m_TechStat.put("robotics",0);
+        m_TechStat.put("lasers",0);
+        m_TechStat.put("the_internet",0);
+        m_TechStat.put("globalization",0);
+        m_TechStat.put("particle_physics",0);
+        m_TechStat.put("nuclear_fusion",0);
+        m_TechStat.put("nanotechnology",0);
+        m_TechStat.put("stealth",0);
+    }
+    public void SetTechTree(String TechName, Integer set){
+        m_TechStat.replace(TechName,set);
+    }
+
+    public int GetTechTree(String TechName){
+        return m_TechStat.get(TechName);
+    }
 }
diff --git a/Array/GroupArray.java b/Array/GroupArray.java
index a093047..bbbeaad 100644
--- a/Array/GroupArray.java
+++ b/Array/GroupArray.java
@@ -9,7 +9,7 @@ import java.util.*;
 public class GroupArray {
 
 
-    protected Map<UUID, Group> m_GroupArray;
+    public Map<UUID, Group> m_GroupArray;
     protected Map<String, UUID> m_GroupNameList;
     public List<UUID> m_DeleteQueue = new ArrayList<>();
     UserInfoArray m_UserInfoArray;
@@ -36,6 +36,18 @@ public class GroupArray {
         }
     }
 
+    public void InitGroupTechTree(UUID GroupUUID){
+        m_GroupArray.get(GroupUUID).InitTechTree();
+    }
+    public void SetGroupTechTree(UUID GroupUUID, String TechName, Integer set){
+        m_GroupArray.get(GroupUUID).SetTechTree(TechName,set);
+
+    }
+
+    public int GetGroupTechTree(UUID GroupUUID, String TechName){
+        return m_GroupArray.get(GroupUUID).GetTechTree(TechName);
+    }
+
     public boolean PutGroup(UUID GroupUUID, String Name,List<UUID> PlayerUUID){
         List<UUID> m_MemberList = new ArrayList<>();
 
diff --git a/Array/Nation.java b/Array/Nation.java
index f341944..5e15c15 100644
--- a/Array/Nation.java
+++ b/Array/Nation.java
@@ -1,11 +1,93 @@
 package org.poopki.duckdns.user_db.Array;
 
-import java.util.ArrayList;
-import java.util.List;
-import java.util.UUID;
+import java.util.*;
 
 public class Nation extends Group{
     public Nation(String Name, List<UUID> uuid_list){
         super(Name, uuid_list);
     }
+    private Map<String, Integer> m_TechStat = new HashMap<String, Integer>();
+    public void InitTechTree(){
+        m_TechStat.put("agriculture",0);
+        m_TechStat.put("pottery",0);
+        m_TechStat.put("animal_husbandry",0);
+        m_TechStat.put("archery",0);
+        m_TechStat.put("mining",0);
+        m_TechStat.put("sailing",0);
+        m_TechStat.put("calendar",0);
+        m_TechStat.put("writing",0);
+        m_TechStat.put("trapping",0);
+        m_TechStat.put("wheel",0);
+        m_TechStat.put("masonry",0);
+        m_TechStat.put("bronze",0);
+        m_TechStat.put("optics",0);
+        m_TechStat.put("horseback",0);
+        m_TechStat.put("mathematics",0);
+        m_TechStat.put("construction",0);
+        m_TechStat.put("philosophy",0);
+        m_TechStat.put("drama",0);
+        m_TechStat.put("currency",0);
+        m_TechStat.put("engineering",0);
+        m_TechStat.put("iron_working",0);
+        m_TechStat.put("theology",0);
+        m_TechStat.put("civil_service",0);
+        m_TechStat.put("guilds",0);
+        m_TechStat.put("metal_casting",0);
+        m_TechStat.put("compass",0);
+        m_TechStat.put("education",0);
+        m_TechStat.put("chivalry",0);
+        m_TechStat.put("machinery",0);
+        m_TechStat.put("physics",0);
+        m_TechStat.put("steel",0);
+        m_TechStat.put("astronomy",0);
+        m_TechStat.put("acoustics",0);
+        m_TechStat.put("banking",0);
+        m_TechStat.put("printing_press",0);
+        m_TechStat.put("gunpowder",0);
+        m_TechStat.put("navigation",0);
+        m_TechStat.put("architecture",0);
+        m_TechStat.put("economics",0);
+        m_TechStat.put("metallurgy",0);
+        m_TechStat.put("chemistry",0);
+        m_TechStat.put("archaeology",0);
+        m_TechStat.put("scientific_theory",0);
+        m_TechStat.put("industrialization",0);
+        m_TechStat.put("rifling",0);
+        m_TechStat.put("military_science",0);
+        m_TechStat.put("fertilizer",0);
+        m_TechStat.put("biology",0);
+        m_TechStat.put("electricity",0);
+        m_TechStat.put("steam_power",0);
+        m_TechStat.put("dynamite",0);
+        m_TechStat.put("refrigeration",0);
+        m_TechStat.put("radio",0);
+        m_TechStat.put("flight",0);
+        m_TechStat.put("railroad",0);
+        m_TechStat.put("plastics",0);
+        m_TechStat.put("electronics",0);
+        m_TechStat.put("ballistics",0);
+        m_TechStat.put("combustion",0);
+        m_TechStat.put("penicillin",0);
+        m_TechStat.put("atomic_theory",0);
+        m_TechStat.put("radar",0);
+        m_TechStat.put("combined_arms",0);
+        m_TechStat.put("ecology",0);
+        m_TechStat.put("nuclear_fission",0);
+        m_TechStat.put("rocketry",0);
+        m_TechStat.put("computers",0);
+        m_TechStat.put("telecommunications",0);
+        m_TechStat.put("mobile_tactics",0);
+        m_TechStat.put("advanced_ballistics",0);
+        m_TechStat.put("satellites",0);
+        m_TechStat.put("robotics",0);
+        m_TechStat.put("lasers",0);
+        m_TechStat.put("the_internet",0);
+        m_TechStat.put("globalization",0);
+        m_TechStat.put("particle_physics",0);
+        m_TechStat.put("nuclear_fusion",0);
+        m_TechStat.put("nanotechnology",0);
+        m_TechStat.put("stealth",0);
+    }
+
+
 }
diff --git a/Array/NationEventHandler.java b/Array/NationEventHandler.java
index c7f2a7a..da50e8c 100644
--- a/Array/NationEventHandler.java
+++ b/Array/NationEventHandler.java
@@ -49,12 +49,12 @@ public class NationEventHandler implements CommandExecutor {
                     m_UserInfoArray.setUserGroupUUID("Nation",p.getUniqueId(), tempUUID);
                     m_AccountArray.putAccountInfo(tempUUID,0);
 
+
                     for (UUID key: m_UserInfoArray.getKeySet()){
                         p.sendMessage("------------"+p.getUniqueId());
                         p.sendMessage(""+m_UserInfoArray.getUserGroupUUID(key,"Nation"));
                     }
-
-                    p.sendMessage(args[1]+"국가이 생성되었습니다.");
+                    p.sendMessage(args[1]+"국가이 생성되었습니다."+m_NationArray.GetGroupTechTree(tempUUID,"agriculture"));
                     p.sendMessage("국가 멤버 목록: ");
 
                     for (String Name: m_NationArray.GetGroupMembersName(tempUUID)){
@@ -280,6 +280,10 @@ public class NationEventHandler implements CommandExecutor {
                     p.sendMessage("==잔액: " + m_AccountArray.getAccountInfo(m_NationArray.GetUUID(args[1]))+ "원==");
                     break;
                 }
+                case "테크": {
+                    m_NationArray.SetGroupTechTree(m_NationArray.GetUUID(args[1]),args[2],1);
+                    break;
+                }
                 default: {
                     p.sendMessage("잘못된 명령어");
                 }
diff --git a/DB/DBUpdate.java b/DB/DBUpdate.java
index 4a1b7d1..f5a55da 100644
--- a/DB/DBUpdate.java
+++ b/DB/DBUpdate.java
@@ -42,17 +42,8 @@ public class DBUpdate {
             System.out.println("Connection success");
             stmt = conn.createStatement();
             StringBuilder sb = new StringBuilder();
-            String sql = sb.append("create table if not exists UserInfo(")
-                    .append("UUID varchar(36) PRIMARY KEY,")
-                    .append("Name varchar(15), ")
-                    .append("Nation varchar(36),") //public
-                    .append("Squad varchar(36),")  //public
-                    .append("Farm varchar(36),") //public
-                    .append("Account int(10)") //public
-                    /*
-                    .append("Occupation int(8),") //private
-                    .append("Account int(8),") //private
-                    .append("Status int(8)") //private*/
+            String sql = sb.append("create table if not exists TechTree(")
+                    .append("UUID varchar(36) PRIMARY KEY")
                     .append(")").toString();
                     stmt.execute(sql);
             }
@@ -178,8 +169,41 @@ public class DBUpdate {
                 conn.close();
             }
         }
+        //
 
+        try {
+            Class.forName("org.mariadb.jdbc.Driver");
+
+            conn = DriverManager.getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
+            System.out.println("Connection success");
+            stmt = conn.createStatement();
+            String sql =  "SELECT * FROM TechTree";
+            ResultSet rs = stmt.executeQuery(sql);
+
+            while(rs.next()){
+                Integer index=2;
+                if(rs.getString(index) != null){
+                        for(String TechName: m_NationArray.m_GroupArray.get(UUID.fromString(rs.getString(1))).TechList){
+                            m_NationArray.SetGroupTechTree(UUID.fromString(rs.getString(1)),TechName, Integer.parseInt(rs.getString(index)));
+                            index++;
+                        }
+                }
+            }
+
+        }  catch (ClassNotFoundException e) {
+            e.printStackTrace();
+        }
+        catch (SQLException e) {
+            // TODO Auto-generated catch block
+            System.err.println("에러 내용 :" + e.getMessage());
+            System.out.println("DB Connection fail");
+        }finally{
+            if(conn != null && !conn.isClosed()){
+                conn.close();
+            }
+        }
 
+        //
         try {
             Class.forName("org.mariadb.jdbc.Driver");
 
@@ -384,7 +408,74 @@ public class DBUpdate {
                 pstmt = conn.prepareStatement(sql);
                 pstmt.setString(1, String.valueOf(key.toString()));
                 int cnt = pstmt.executeUpdate();
-                m_NationArray.m_DeleteQueue.remove(key);
+
+            }
+        }
+        catch(ClassNotFoundException e){
+            e.printStackTrace();
+        }
+        catch(SQLException e){
+            System.err.println("에러 내용 :" + e.getMessage());
+            System.out.println("DB Connection fail");
+        }
+        finally {
+            if( conn != null && !conn.isClosed()){
+                conn.close();
+            }
+        }
+
+        try{
+            Class.forName("org.mariadb.jdbc.Driver");
+            conn = DriverManager.getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
+
+            for (UUID key : m_SquadArray.getKeySet()) {
+
+                String sql = "REPLACE INTO Squad VALUES (?,?,?,?,?,?,?,?,?,?,?)";
+                pstmt = conn.prepareStatement(sql);
+                pstmt.setString(1, String.valueOf(key.toString()));
+                pstmt.setString(2, String.valueOf(m_SquadArray.GetGroupName(key)));
+                pstmt.setString(3, String.valueOf(m_AccountArray.getAccountInfo(key)));
+                int index = 4;
+                for (UUID MemUUID : m_SquadArray.GetGroupMembersUUID(key)){
+                    pstmt.setString(index, String.valueOf(MemUUID.toString()));
+                    index++;
+                }
+                for(; index<=11;index++){
+                    pstmt.setString(index, null);
+                }
+
+                int cnt = pstmt.executeUpdate();
+                if( cnt == 0 ){
+                    System.out.println("데이터 입력 실패");
+                }
+                else{
+                    System.out.println("데이터 입력 성공");
+                }
+
+            }
+        }
+        catch(ClassNotFoundException e){
+            e.printStackTrace();
+        }
+        catch(SQLException e){
+            System.err.println("에러 내용 :" + e.getMessage());
+            System.out.println("DB Connection fail");
+        }
+        finally {
+            if( conn != null && !conn.isClosed()){
+                conn.close();
+            }
+        }
+
+        try{
+            Class.forName("org.mariadb.jdbc.Driver");
+            conn = DriverManager.getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
+            for (UUID key: m_SquadArray.m_DeleteQueue){
+                String sql = "DELETE FROM Squad WHERE Squad_UUID=?";
+                pstmt = conn.prepareStatement(sql);
+                pstmt.setString(1, String.valueOf(key.toString()));
+                int cnt = pstmt.executeUpdate();
+                m_SquadArray.m_DeleteQueue.remove(key);
             }
         }
         catch(ClassNotFoundException e){
@@ -447,7 +538,7 @@ public class DBUpdate {
             Class.forName("org.mariadb.jdbc.Driver");
             conn = DriverManager.getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
             for (UUID key: m_SquadArray.m_DeleteQueue){
-                String sql = "DELETE FROM Squad WHERE FARM_UUID=?";
+                String sql = "DELETE FROM Squad WHERE Squad_UUID=?";
                 pstmt = conn.prepareStatement(sql);
                 pstmt.setString(1, String.valueOf(key.toString()));
                 int cnt = pstmt.executeUpdate();
@@ -466,5 +557,70 @@ public class DBUpdate {
                 conn.close();
             }
         }
+
+        //Update Tech
+        try{
+            Class.forName("org.mariadb.jdbc.Driver");
+            conn = DriverManager.getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
+
+            for (UUID key : m_NationArray.getKeySet()) {
+
+                String sql = "REPLACE INTO TechTree VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
+                pstmt = conn.prepareStatement(sql);
+                int index = 2;
+
+                pstmt.setString(1, String.valueOf(key.toString()));
+                for (String Name : m_NationArray.m_GroupArray.get(key).TechList){
+                    System.out.println(Name+String.valueOf(m_NationArray.m_GroupArray.get(key).GetTechTree(Name)));
+                    pstmt.setString(index, String.valueOf(m_NationArray.m_GroupArray.get(key).GetTechTree(Name)));
+                    index++;
+                }
+
+                int cnt = pstmt.executeUpdate();
+                if( cnt == 0 ){
+                    System.out.println("데이터 입력 실패");
+                }
+                else{
+                    System.out.println("데이터 입력 성공");
+                }
+
+            }
+        }
+        catch(ClassNotFoundException e){
+            e.printStackTrace();
+        }
+        catch(SQLException e){
+            System.err.println("에러 내용 :" + e.getMessage());
+            System.out.println("DB Connection fail");
+        }
+        finally {
+            if( conn != null && !conn.isClosed()){
+                conn.close();
+            }
+        }
+
+        try{
+            Class.forName("org.mariadb.jdbc.Driver");
+            conn = DriverManager.getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);
+            for (UUID key: m_NationArray.m_DeleteQueue){
+                String sql = "DELETE FROM TechTree WHERE UUID=?";
+                pstmt = conn.prepareStatement(sql);
+                pstmt.setString(1, String.valueOf(key.toString()));
+                int cnt = pstmt.executeUpdate();
+                m_NationArray.m_DeleteQueue.remove(key);
+            }
+        }
+        catch(ClassNotFoundException e){
+            e.printStackTrace();
+        }
+        catch(SQLException e){
+            System.err.println("에러 내용 :" + e.getMessage());
+            System.out.println("DB Connection fail");
+        }
+        finally {
+            if( conn != null && !conn.isClosed()){
+                conn.close();
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/GUI/AccountGUI.java b/GUI/AccountGUI.java
index 8ba9110..b95e8f5 100644
--- a/GUI/AccountGUI.java
+++ b/GUI/AccountGUI.java
@@ -1,5 +1,6 @@
 package org.poopki.duckdns.user_db.GUI;
 
+import dev.lone.itemsadder.api.CustomStack;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.entity.Player;
@@ -11,10 +12,13 @@ import org.poopki.duckdns.user_db.Array.FarmArray;
 import org.poopki.duckdns.user_db.Array.NationArray;
 import org.poopki.duckdns.user_db.Array.SquadArray;
 import org.poopki.duckdns.user_db.UserInfoArray;
-
+import org.bukkit.inventory.ItemStack;
 import java.util.UUID;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
 import org.apache.commons.lang.StringEscapeUtils;
-
+import java.util.stream.Stream;
 public class AccountGUI implements Listener{
     private final Inventory inv;
     UUID m_uuid;
@@ -26,7 +30,7 @@ public class AccountGUI implements Listener{
     SquadArray m_SA;
     public AccountGUI(AccountArray AA, UserInfoArray UIA, FarmArray FA, NationArray NA, SquadArray SA, UUID uuid, InventoryClickEvent e) {
         m_uuid=uuid;
-        this.inv = Bukkit.createInventory(null,54,ChatColor.WHITE+StringEscapeUtils.unescapeJava("\uE00A")+StringEscapeUtils.unescapeJava("\uE00B"));
+        this.inv = Bukkit.createInventory(null,54,":offset_-8::bank_main:");
         m_AA    =   AA;
         m_UIA   =   UIA;
         m_FA    =   FA;
@@ -47,7 +51,24 @@ public class AccountGUI implements Listener{
         inv.setItem(19, m_ItemManager.btn4);
         inv.setItem(11, m_ItemManager.btn5);
         inv.setItem(20, m_ItemManager.btn6);
+
+        CustomStack stack = CustomStack.getInstance("digits:digit-zero");
+        ItemStack itemStack = stack.getItemStack();
         */
+        List<String> strList = new ArrayList<String>();
+
+        String before = String.valueOf(m_AA.getAccountInfo(m_uuid));
+        strList.addAll(Arrays.asList(before.split("")));
+
+        int tmp = strList.size();
+        for(int i=0; i<8-tmp; i++) {
+            strList.add(0, "0");
+        }
+
+        for(int i = 0; i<strList.size(); i++){
+            inv.setItem(10+i, CustomStack.getInstance("digits:digit-"+strList.get(i)).getItemStack());
+        }
+
     }
 
     public void open(Player player){
diff --git a/GUI/OpenInv.java b/GUI/OpenInv.java
index 4e4ee98..6512e8f 100644
--- a/GUI/OpenInv.java
+++ b/GUI/OpenInv.java
@@ -42,7 +42,6 @@ public class OpenInv implements Listener,CommandExecutor {
         player.sendMessage("이벤트 발생");
         BaseGUI inv = new BaseGUI(m_AccountArray,m_UserInfoArray,m_FarmArray,m_NationArray, m_SquadArray, player.getUniqueId(), e);
         inv.inven(e);
-
     }
 
 
diff --git a/GUI/TechGUI.java b/GUI/TechGUI.java
new file mode 100644
index 0000000..536f0eb
--- /dev/null
+++ b/GUI/TechGUI.java
@@ -0,0 +1,138 @@
+package org.poopki.duckdns.user_db.GUI;
+
+import dev.lone.itemsadder.api.CustomStack;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.inventory.Inventory;
+import org.poopki.duckdns.user_db.Array.AccountArray;
+import org.poopki.duckdns.user_db.Array.FarmArray;
+import org.poopki.duckdns.user_db.Array.NationArray;
+import org.poopki.duckdns.user_db.Array.SquadArray;
+import org.poopki.duckdns.user_db.UserInfoArray;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.UUID;
+
+public class TechGUI implements Listener{
+    private final Inventory inv;
+    UUID m_uuid;
+    ItemManager m_ItemManager = new ItemManager();
+    AccountArray m_AA;
+    UserInfoArray m_UIA;
+    FarmArray m_FA;
+    NationArray m_NA;
+    SquadArray m_SA;
+    public TechGUI(AccountArray AA, UserInfoArray UIA, FarmArray FA, NationArray NA, SquadArray SA, UUID uuid, InventoryClickEvent e) {
+        m_uuid=uuid;
+        this.inv = Bukkit.createInventory(null,54,":offset_-8::ancient_era:");
+
+        m_AA    =   AA;
+        m_UIA   =   UIA;
+        m_FA    =   FA;
+        m_NA    =   NA;
+        m_SA    =   SA;
+        initItemSetting();
+    }
+
+    private void initItemSetting() {
+/*
+        inv.setItem(0,m_ItemManager.GetBalance(m_AA, m_UIA, m_FA, m_NA,m_SA,m_uuid, "User"));
+        inv.setItem(1,m_ItemManager.GetBalance(m_AA, m_UIA, m_FA, m_NA,m_SA,m_uuid, "Nation"));
+        inv.setItem(2,m_ItemManager.GetBalance(m_AA, m_UIA, m_FA, m_NA,m_SA,m_uuid, "Farm"));
+
+        inv.setItem(9, m_ItemManager.btn1);
+        inv.setItem(18, m_ItemManager.btn2);
+        inv.setItem(10, m_ItemManager.btn3);
+        inv.setItem(19, m_ItemManager.btn4);
+        inv.setItem(11, m_ItemManager.btn5);
+        inv.setItem(20, m_ItemManager.btn6);
+
+        CustomStack stack = CustomStack.getInstance("digits:digit-zero");
+        ItemStack itemStack = stack.getItemStack();
+        */
+
+        inv.setItem(27, CustomStack.getInstance("techtree:agriculture_"+ Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"agriculture"))).getItemStack());
+
+        inv.setItem(20, CustomStack.getInstance("techtree:pottery_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"pottery"))).getItemStack());
+        inv.setItem(29, CustomStack.getInstance("techtree:archery_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"archery"))).getItemStack());
+        inv.setItem(38, CustomStack.getInstance("techtree:mining_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"mining"))).getItemStack());
+
+        inv.setItem(13, CustomStack.getInstance("techtree:animal_husbandry_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"animal_husbandry"))).getItemStack());
+        inv.setItem(22, CustomStack.getInstance("techtree:writing_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"writing"))).getItemStack());
+        inv.setItem(31, CustomStack.getInstance("techtree:masonry_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"masonry"))).getItemStack());
+        inv.setItem(40, CustomStack.getInstance("techtree:bronze_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"bronze"))).getItemStack());
+
+        inv.setItem(15, CustomStack.getInstance("techtree:calendar_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"calendar"))).getItemStack());
+        inv.setItem(24, CustomStack.getInstance("techtree:trapping_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"trapping"))).getItemStack());
+        inv.setItem(33, CustomStack.getInstance("techtree:writing_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"writing"))).getItemStack());
+        inv.setItem(42, CustomStack.getInstance("techtree:wheel_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"wheel"))).getItemStack());
+        inv.setItem(51, CustomStack.getInstance("techtree:optics_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"optics"))).getItemStack());
+
+        inv.setItem(17, CustomStack.getInstance("techtree:sailing_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"sailing"))).getItemStack());
+        inv.setItem(26, CustomStack.getInstance("techtree:mathematics_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"mathematics"))).getItemStack());
+        inv.setItem(35, CustomStack.getInstance("techtree:construction_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"construction"))).getItemStack());
+        inv.setItem(44, CustomStack.getInstance("techtree:horseback_"+Integer.toString(m_NA.GetGroupTechTree(m_UIA.getUserGroupUUID(m_uuid,"Nation"),"horseback"))).getItemStack());
+
+
+    }
+
+    public void open(Player player){
+        player.openInventory(inv);
+    }
+
+    public void inven(InventoryClickEvent e){
+        Player p = (Player) e.getWhoClicked();
+        Inventory m_inv = e.getClickedInventory();
+
+        if (e.getInventory() != m_inv) return;
+
+        switch(e.getCurrentItem().getType()){
+            case CANDLE:
+                e.setCancelled(true);
+                p.sendMessage("10000원 증가");
+                m_AA.setAccountInfo(p.getUniqueId(), (long)m_AA.getAccountInfo(p.getUniqueId())+10000);
+                initItemSetting();
+                p.openInventory(inv);
+                break;
+            case BEEF:
+                e.setCancelled(true);
+                p.sendMessage("10000원 감소");
+                m_AA.setAccountInfo(p.getUniqueId(), (long)m_AA.getAccountInfo(p.getUniqueId())-10000);
+                initItemSetting();
+                p.openInventory(inv);
+                break;
+            case TORCH:
+                e.setCancelled(true);
+                p.sendMessage("국가 10000원 증가"+ m_AA.getAccountInfo(m_UIA.getUserGroupUUID(m_uuid, "Nation")));
+                m_AA.setAccountInfo(m_UIA.getUserGroupUUID(p.getUniqueId(),"Nation"), (long)m_AA.getAccountInfo(m_UIA.getUserGroupUUID(p.getUniqueId(),"Nation"))+10000);
+                initItemSetting();
+                p.openInventory(inv);
+                break;
+            case GRASS:
+                e.setCancelled(true);
+                p.sendMessage("국가 10000원 감소"+ m_AA.getAccountInfo(m_UIA.getUserGroupUUID(m_uuid, "Nation")));
+                m_AA.setAccountInfo(m_UIA.getUserGroupUUID(p.getUniqueId(),"Nation"), (long)m_AA.getAccountInfo(m_UIA.getUserGroupUUID(p.getUniqueId(),"Nation"))-10000);
+                initItemSetting();
+                p.openInventory(inv);
+                break;
+            case DIAMOND:
+                e.setCancelled(true);
+                p.sendMessage("농장 10000원 증가"+ m_AA.getAccountInfo(m_UIA.getUserGroupUUID(m_uuid, "Farm")));
+                m_AA.setAccountInfo(m_UIA.getUserGroupUUID(p.getUniqueId(),"Farm"), (long)m_AA.getAccountInfo(m_UIA.getUserGroupUUID(p.getUniqueId(),"Farm"))+10000);
+                initItemSetting();
+                p.openInventory(inv);
+                break;
+            case IRON_INGOT:
+                e.setCancelled(true);
+                p.sendMessage("농장 10000원 감소"+ m_AA.getAccountInfo(m_UIA.getUserGroupUUID(m_uuid, "Farm")));
+                m_AA.setAccountInfo(m_UIA.getUserGroupUUID(p.getUniqueId(),"Farm"), (long)m_AA.getAccountInfo(m_UIA.getUserGroupUUID(p.getUniqueId(),"Farm"))-10000);
+                initItemSetting();
+                p.openInventory(inv);
+                break;
+        }
+    }
+}
diff --git a/GUI/TechGUIEvent.java b/GUI/TechGUIEvent.java
new file mode 100644
index 0000000..173a22c
--- /dev/null
+++ b/GUI/TechGUIEvent.java
@@ -0,0 +1,64 @@
+package org.poopki.duckdns.user_db.GUI;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.poopki.duckdns.user_db.Array.AccountArray;
+import org.poopki.duckdns.user_db.Array.FarmArray;
+import org.poopki.duckdns.user_db.Array.NationArray;
+import org.poopki.duckdns.user_db.Array.SquadArray;
+import org.poopki.duckdns.user_db.UserInfoArray;
+
+import java.util.UUID;
+
+
+public class TechGUIEvent implements Listener,CommandExecutor {
+    AccountArray m_AccountArray;
+    UserInfoArray m_UserInfoArray;
+    FarmArray m_FarmArray;
+    NationArray m_NationArray;
+    SquadArray m_SquadArray;
+    UUID ZERO_UUID = new UUID(0,0);
+    public TechGUIEvent(UserInfoArray m_UIA, FarmArray FA, NationArray NA, SquadArray SA, AccountArray AA){
+        m_UserInfoArray = m_UIA;
+        m_AccountArray  = AA;
+        m_FarmArray     = FA;
+        m_NationArray   = NA;
+        m_SquadArray    = SA;
+    }
+    @Override
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        if(sender instanceof Player){
+            if(ZERO_UUID.equals(m_UserInfoArray.getUserGroupUUID(((Player) sender).getUniqueId(), "Nation"))){
+                Player player = (Player) sender;
+                player.sendMessage("국가에 소속된 유저만 사용이 가능");
+            }
+            else{
+                Player player = (Player) sender;
+                player.sendMessage("TECH: "+player.getUniqueId());
+                player.sendMessage("TECH: "+m_UserInfoArray.getUserGroupUUID(player.getUniqueId(),"Nation"));
+                player.sendMessage("TECH: "+m_NationArray.GetGroupTechTree(m_UserInfoArray.getUserGroupUUID(player.getUniqueId(),"Nation"),"agriculture"));
+
+                TechGUI inv = new TechGUI(m_AccountArray,m_UserInfoArray,m_FarmArray,m_NationArray, m_SquadArray,player.getUniqueId(), null);
+
+                inv.open(player);
+            }
+        }
+        return false;
+    }
+    @EventHandler
+    public void inven2(InventoryClickEvent e){
+        Player player = (Player) e.getWhoClicked();;
+        player.sendMessage("이벤트 발생");
+        TechGUI inv = new TechGUI(m_AccountArray,m_UserInfoArray,m_FarmArray,m_NationArray, m_SquadArray, player.getUniqueId(), e);
+        inv.inven(e);
+
+    }
+
+
+
+}
diff --git a/GUI/TechStat.java b/GUI/TechStat.java
new file mode 100644
index 0000000..fef2080
--- /dev/null
+++ b/GUI/TechStat.java
@@ -0,0 +1,101 @@
+package org.poopki.duckdns.user_db.GUI;
+
+import org.poopki.duckdns.user_db.UserInfo;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+public class TechStat {
+    private Map<String, Integer> m_TechStat = new HashMap<String, Integer>();
+
+    public void InitTechTree(){
+        m_TechStat.put("agriculture",0);
+        m_TechStat.put("pottery",0);
+        m_TechStat.put("animal_husbandry",0);
+        m_TechStat.put("archery",0);
+        m_TechStat.put("mining",0);
+        m_TechStat.put("sailing",0);
+        m_TechStat.put("calendar",0);
+        m_TechStat.put("writing",0);
+        m_TechStat.put("trapping",0);
+        m_TechStat.put("wheel",0);
+        m_TechStat.put("masonry",0);
+        m_TechStat.put("bronze",0);
+        m_TechStat.put("optics",0);
+        m_TechStat.put("horseback",0);
+        m_TechStat.put("mathematics",0);
+        m_TechStat.put("construction",0);
+        m_TechStat.put("philosophy",0);
+        m_TechStat.put("drama",0);
+        m_TechStat.put("currency",0);
+        m_TechStat.put("engineering",0);
+        m_TechStat.put("iron_working",0);
+        m_TechStat.put("theology",0);
+        m_TechStat.put("civil_service",0);
+        m_TechStat.put("guilds",0);
+        m_TechStat.put("metal_casting",0);
+        m_TechStat.put("compass",0);
+        m_TechStat.put("education",0);
+        m_TechStat.put("chivalry",0);
+        m_TechStat.put("machinery",0);
+        m_TechStat.put("physics",0);
+        m_TechStat.put("steel",0);
+        m_TechStat.put("astronomy",0);
+        m_TechStat.put("acoustics",0);
+        m_TechStat.put("banking",0);
+        m_TechStat.put("printing_press",0);
+        m_TechStat.put("gunpowder",0);
+        m_TechStat.put("navigation",0);
+        m_TechStat.put("architecture",0);
+        m_TechStat.put("economics",0);
+        m_TechStat.put("metallurgy",0);
+        m_TechStat.put("chemistry",0);
+        m_TechStat.put("archaeology",0);
+        m_TechStat.put("scientific_theory",0);
+        m_TechStat.put("industrialization",0);
+        m_TechStat.put("rifling",0);
+        m_TechStat.put("military_science",0);
+        m_TechStat.put("fertilizer",0);
+        m_TechStat.put("biology",0);
+        m_TechStat.put("electricity",0);
+        m_TechStat.put("steam_power",0);
+        m_TechStat.put("dynamite",0);
+        m_TechStat.put("refrigeration",0);
+        m_TechStat.put("radio",0);
+        m_TechStat.put("flight",0);
+        m_TechStat.put("railroad",0);
+        m_TechStat.put("plastics",0);
+        m_TechStat.put("electronics",0);
+        m_TechStat.put("ballistics",0);
+        m_TechStat.put("combustion",0);
+        m_TechStat.put("penicillin",0);
+        m_TechStat.put("atomic_theory",0);
+        m_TechStat.put("radar",0);
+        m_TechStat.put("combined_arms",0);
+        m_TechStat.put("ecology",0);
+        m_TechStat.put("nuclear_fission",0);
+        m_TechStat.put("rocketry",0);
+        m_TechStat.put("computers",0);
+        m_TechStat.put("telecommunications",0);
+        m_TechStat.put("mobile_tactics",0);
+        m_TechStat.put("advanced_ballistics",0);
+        m_TechStat.put("satellites",0);
+        m_TechStat.put("robotics",0);
+        m_TechStat.put("lasers",0);
+        m_TechStat.put("the_internet",0);
+        m_TechStat.put("globalization",0);
+        m_TechStat.put("particle_physics",0);
+        m_TechStat.put("nuclear_fusion",0);
+        m_TechStat.put("nanotechnology",0);
+        m_TechStat.put("stealth",0);
+    }
+
+    public void EnableTechTree(String TechName){
+        m_TechStat.replace(TechName,1);
+    }
+
+    public int GetTachTree(String TechName){
+        return m_TechStat.get(TechName);
+    }
+}
diff --git a/User_DB.java b/User_DB.java
index 713bf32..0101dc3 100644
--- a/User_DB.java
+++ b/User_DB.java
@@ -39,6 +39,7 @@ public final class User_DB extends JavaPlugin implements Listener {
         getCommand("분대").setExecutor(new SquadEventHandler(m_InfoArrayInstance,  m_SquadArrayInstance, m_AccountArrayInstance));
         getCommand("opitem").setExecutor(new OpenInv(m_InfoArrayInstance, m_FarmArrayInstance, m_NationArrayInstance, m_SquadArrayInstance, m_AccountArrayInstance));
         getCommand("은행").setExecutor(new AccountGUIEvent(m_InfoArrayInstance, m_FarmArrayInstance, m_NationArrayInstance, m_SquadArrayInstance, m_AccountArrayInstance));
+        getCommand("테크").setExecutor(new TechGUIEvent(m_InfoArrayInstance, m_FarmArrayInstance, m_NationArrayInstance, m_SquadArrayInstance, m_AccountArrayInstance));
         getCommand("초대").setExecutor(new InviteMaster(m_InfoArrayInstance, m_FarmArrayInstance, m_NationArrayInstance, m_SquadArrayInstance));
 
         getServer().getPluginManager().registerEvents(new UserJoin(m_InfoArrayInstance, m_FarmArrayInstance, m_NationArrayInstance, m_SquadArrayInstance, m_AccountArrayInstance, m_ScoreboardEventHandler),