diff --git a/AccountArray.java b/AccountArray.java
index 111b4b6..a0fb005 100644
--- a/AccountArray.java
+++ b/AccountArray.java
@@ -7,13 +7,15 @@ import java.util.UUID;
 public class AccountArray {
     private static Map<UUID, Account> m_AccountArray = new HashMap<UUID, Account>();
 
-    public void transfer(UUID Src, UUID Des, int Amount){ // 송금 method
+    public boolean transfer(UUID Src, UUID Des, int Amount){ // 송금 method
         Account m_Src = m_AccountArray.get(Src);
         Account m_Des = m_AccountArray.get(Des);
 
         if(m_Src.withdraw(Amount)){ //인출 성공시 입금
             m_Des.credit(Amount);
+            return true;
         }
+        return false;
     }
 
     public int getAccountInfo(UUID uuid) { // DB backup시 account 정보 접근 method
diff --git a/AccountEventHandler.java b/AccountEventHandler.java
index fa4e551..0f7f06e 100644
--- a/AccountEventHandler.java
+++ b/AccountEventHandler.java
@@ -11,19 +11,37 @@ public class AccountEventHandler implements CommandExecutor {
     public AccountEventHandler(AccountArray AA){
         m_AccountArray = AA;
     }
+    public static boolean isStringDouble(String s) {
+        try {
+            Double.parseDouble(s);
+            return true;
+        } catch (NumberFormatException e) {
+            return false;
+        }
+    }
     @Override
     public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
         Player p = (Player) sender;
 
         if (args.length != 0) {
             switch (args[0]) {
-                case "계좌설정": {
+                case "설정": {
                     if (p.isOp()) {
                         if (args[1] != null) {
                             Player op = Bukkit.getPlayer(args[1]);
-                            p.sendMessage("계좌 UUID: " + op.getUniqueId());
                             if (op != null) {
-                                m_AccountArray.setAccountInfo(op.getUniqueId(), Integer.parseInt(args[2]));
+                                try{
+                                    if(isStringDouble(args[2])){
+                                        m_AccountArray.setAccountInfo(op.getUniqueId(), Integer.parseInt(args[2]));
+                                        p.sendMessage(op.getName()+"님의 잔액을"+Integer.parseInt(args[2])+"원으로 설정하였습니다.");
+                                    }
+                                    else {
+                                        p.sendMessage("설정 금액은 숫자만 가능합니다.");
+                                    }
+                                } catch(Exception e){
+                                    p.sendMessage("설정 대상의 닉네임을 모두 작성해야합니다.");
+                                }
+
                             } else {
                                 p.sendMessage("잘못된 계좌입니다.");
                             }
@@ -31,21 +49,36 @@ public class AccountEventHandler implements CommandExecutor {
                     } else {
                         p.sendMessage("OP만 실행 가능한 명령어");
                     }
+                    break;
                 }
                 case "잔액": {
                     p.sendMessage("잔액: " + m_AccountArray.getAccountInfo(p.getUniqueId()) + "원");
+                    break;
                 }
                 case "이체": {
-                    if (args[1] != null) {
+                    if (args.length > 1) {
                         Player op = Bukkit.getPlayer(args[1]);
                         if (op != null) {
-                            m_AccountArray.transfer(p.getUniqueId(), op.getUniqueId(), Integer.parseInt(args[2]));
+                            if(isStringDouble(args[2])){
+                                try{
+                                    boolean temp = m_AccountArray.transfer(p.getUniqueId(), op.getUniqueId(), Integer.parseInt(args[2]));
+                                    if(temp)
+                                        p.sendMessage(op.getName()+"님 에게 "+Integer.parseInt(args[2])+"원을 이체하였습니다.");
+                                    else
+                                        p.sendMessage("잔액이 부족합니다.");
+                                }catch (Exception e){
+                                    p.sendMessage("이체 대상의 닉네임을 모두 작성해야합니다.");
+                                }
+                            }
+                            else
+                                p.sendMessage("이체 금액은 숫자만 가능합니다.");
                         } else {
                             p.sendMessage("잘못된 계좌입니다.");
                         }
                     } else {
-                        p.sendMessage("대상이 지정되지 않음");
+                        p.sendMessage("이체 대상이 지정되지 않았습니다.");
                     }
+                    break;
                 }
                 default: {
                     p.sendMessage("잘못된 명령어");
@@ -53,6 +86,9 @@ public class AccountEventHandler implements CommandExecutor {
             }
 
         }
+        else{
+            p.sendMessage("명령어를 입력하세요(잔액 | 이체)");
+        }
         return false;
     }
 }
diff --git a/Command.java b/Command.java
deleted file mode 100644
index c411370..0000000
--- a/Command.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package org.poopki.duckdns.user_db;
-import org.bukkit.Material;
-import org.bukkit.command.Command;
-import org.bukkit.command.CommandExecutor;
-import org.bukkit.command.CommandSender;
-import org.bukkit.command.ConsoleCommandSender;
-import org.bukkit.entity.Player;
-import org.bukkit.inventory.ItemStack;
-public class Command implements CommandExecutor {
-}