diff --git a/src/game/lib/db_connect_manager.js b/src/game/lib/db_connect_manager.js
index 7bf45b8..4e68cda 100644
--- a/src/game/lib/db_connect_manager.js
+++ b/src/game/lib/db_connect_manager.js
@@ -62,6 +62,23 @@ DBConnectManager.prototype.requestCheckPlayerLogin = function(maestroName, playe
 	xhr.send("maestro_name=" + maestroName + "&name=" + playerName + "&enter_code=" + enterCode);
 }
 
+DBConnectManager.prototype.requestPlayerEnterCode = function(maestroID, playerID, onSucceededListener, onFailedListener) {
+	var xhr = new XMLHttpRequest();
+	xhr.open("POST", this.phpPath + "server/player/get_entercode.php", true);
+	xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
+	xhr.onreadystatechange = function() {
+		if(xhr.readyState == 4 && xhr.status == 200) {
+			var replyJSON = JSON.parse(xhr.responseText);
+
+			if(replyJSON != null && replyJSON["EnterCode"] != null)
+				onSucceededListener(replyJSON);
+			else
+				onFailedListener(replyJSON);
+		}
+	};
+	xhr.send("maestro_id=" + maestroID + "&player_id=" + playerID);
+}
+
 /*
 DBConnectManager.prototype.requestAppList = function(maestroID, onSucceededListener, onFailedListener) {
 	var xhr = new XMLHttpRequest();
diff --git a/src/game/setup/setup.js b/src/game/setup/setup.js
index c720408..891267f 100644
--- a/src/game/setup/setup.js
+++ b/src/game/setup/setup.js
@@ -35,7 +35,7 @@ var Setup = {
 		this.makePrevEnterCodeText(textX, 300);
 		this.makeNewEnterCodeInput(textX, 360);
 
-		this.makeCheckEnterCodeButton(game.world.centerX, game.world.centerY + 100);
+		this.startButton = this.makeCheckEnterCodeButton(game.world.centerX, game.world.centerY + 100);
 /*
 		this.makeMaestroNameText(textX, 200);
 		this.makeNameText(textX, 300);
@@ -69,6 +69,8 @@ var Setup = {
 		// ScreenBottomUI.printCenterText(playingAppName);
 		screenBottomUI.printCenterText("설정");
 		screenBottomUI.printRightText(sessionStorageManager.getPlayerName());
+
+		this.loadPrevEnterCode();
 	},
 
 	back: function() {
@@ -79,7 +81,7 @@ var Setup = {
 
 	makePrevEnterCodeText: function(x, y) {
 		this.makeTextField(x, y, "현재의 입장번호 :");
-		this.makeTextField(x + 200 + 40, y, "111111");
+		this.prevEnterCodeText = this.makeTextField(x + 200 + 40, y, "111111");
 	},
 
 	makeNewEnterCodeInput: function(x, y) {
@@ -103,12 +105,14 @@ var Setup = {
 		var setting = new RoundRectButtonSetting(x, y, 200, 100);
 		setting.fontStyle.fontWeight = "bold";
 
-		var startButton = new RoundRectButton(
+		var checkButton = new RoundRectButton(
 			setting,
 			RoundRectButton.NONE_ICON, "변경",
 			(function() { this.checkNewEnterCode(); }).bind(this)
 		);
-		startButton.addShortcutText("Enter");
+		checkButton.addShortcutText("Enter");
+
+		return checkButton;
 	},
 
 	makeInputTypeText: function(x, y, text) {
@@ -128,55 +132,6 @@ var Setup = {
 	},
 
 
-/*
-	makeMaestroNameText: function(x, y) {
-		this.makeTextField(x, y, "마에스트로 계정 :");
-		this.inputTextMaestroName = this.makeInputTypeText(x, y, "");
-		this.inputTextMaestroName.canvasInput.placeHolder("입력 후 [ Tab ]키를 누르세요");
-	},
-
-	makeNameText: function(x, y) {
-		this.makeTextField(x, y, "이름 :");
-		this.inputTextName = this.makeInputTypeText(x, y, "");
-		this.inputTextName.canvasInput.placeHolder("입력 후 [ Tab ]키를 누르세요");
-	},
-
-	makeEnterCodeText: function(x, y) {
-		this.makeTextField(x, y, "입장번호 :");
-		this.inputTextEnterCode = this.makeInputTypeText(x, y, "");
-		this.inputTextEnterCode.canvasInput.placeHolder("입력 후 [ Tab ]키를 누르세요");
-	},
-
-	makeInputTypeText: function(x, y, text) {
-		var inputText = new InputTypeText(x + 420, y);
-		inputText.anchor.set(0.5);
-		inputText.canvasInput.value('');
-		if(isDebugMode()) {
-			inputText.canvasInput.value(text);
-		}
-		inputText.canvasInput._onkeyup = (function() {
-			if(event.keyCode == Phaser.Keyboard.ENTER) {
-				this.startMenu();
-			}
-		}).bind(this);
-
-		return inputText;
-	},
-
-	makeStartButton: function(x, y) {
-		var setting = new RoundRectButtonSetting(x, y, 200, 100);
-		setting.fontStyle.fontWeight = "bold";
-
-		var startButton = new RoundRectButton(
-			setting,
-			RoundRectButton.NONE_ICON, "시작",
-			(function() { this.startMenu(); }).bind(this)
-		);
-		startButton.addShortcutText("Enter");
-	},
-
-	*/
-
 
 	makeInfoText: function(x, y) {
 		var textStyle = { font: "30px Arial", fill: "#faa" };
@@ -186,8 +141,27 @@ var Setup = {
 		this.infoText.strokeThickness = 3;
 	},
 
+	showInfoText: function(message) {
+		this.infoText.text = message;
+	},
+
 
 	checkNewEnterCode: function() {
+		var newEnterCode = this.inputTextEnterCode.canvasInput._value;
+		if(newEnterCode == this.prevEnterCode) {
+			this.showInfoText("기존 입장번호와 동일합니다.");
+			return;
+		}
+
+		var accountValidator = new AccountValidator();
+		if(accountValidator.isValidPlayerPW(newEnterCode)) {
+			this.showInfoText("입장번호를 바꾸겠습니다.");
+		} else {
+			var errorMessage = accountValidator.messageForInvalidPlayerPW(newEnterCode);
+			this.showInfoText(errorMessage);
+		}
+
+		/*
 		var maestroName = this.inputTextMaestroName.canvasInput._value;
 		sessionStorageManager.setPlayerName(this.inputTextName.canvasInput._value);
 		var enterCode = this.inputTextEnterCode.canvasInput._value;
@@ -218,6 +192,26 @@ var Setup = {
 				this.loginFailed(jsonData);
 			}).bind(this)
 		);
+		*/
+	},
+
+	loadPrevEnterCode: function() {
+		this.prevEnterCode = '1111';
+
+		var dbConnectManager = new DBConnectManager();
+		dbConnectManager.requestPlayerEnterCode(
+			sessionStorageManager.getMaestroID(),
+			sessionStorageManager.getPlayerID(),
+			(function(jsonData) {
+				this.prevEnterCode = jsonData['EnterCode'];
+				console.log(this.prevEnterCode);
+				this.prevEnterCodeText.text = this.prevEnterCode;
+			}).bind(this),
+			(function(jsonData) {
+				this.showInfoText(jsonData['error']);
+				this.statButton.buttonDisabled();
+			}).bind(this)
+		);
 	},
 
 	loginSucceeded: function(jsonData) {
diff --git a/src/web/client/setup.html b/src/web/client/setup.html
index 14c8b41..90b2ff2 100644
--- a/src/web/client/setup.html
+++ b/src/web/client/setup.html
@@ -53,6 +53,9 @@
 		<script src="../../game/lib/button/fullscreen_button.js"></script>
 		<script src="../../game/lib/db_connect_manager.js"></script>
 
+		<script src="../../web/js/lib/account_validator.js"></script>
+
+
 		<!-- source files -->
 		<script src="../../game/setup/setup.js"></script>
 		<script src="../../game/setup/main.js"></script>
diff --git a/src/web/js/lib/account_validator.js b/src/web/js/lib/account_validator.js
index c00a110..8afc481 100644
--- a/src/web/js/lib/account_validator.js
+++ b/src/web/js/lib/account_validator.js
@@ -61,7 +61,9 @@ AccountValidator.prototype.isValidPlayerID = function(textID) {
 }
 
 AccountValidator.prototype.messageForInvalidPlayerID = function(textID) {
-	if(textID.length < Number(AccountValidator.Player_ID_LENGTH_MINIMUM))
+	if(typeof textID == "undefined" || textID == null || textID == "")
+		return "학생 이름을 입력해 주세요.";
+	else if(textID.length < Number(AccountValidator.Player_ID_LENGTH_MINIMUM))
 		return "학생 이름은 " + AccountValidator.Player_ID_LENGTH_MINIMUM + "글자 이상이어야 합니다.";
 	else if(textID.length > Number(AccountValidator.PLAYER_ID_LENGTH_MAXIMUM))
 		return "학생 이름은 " + AccountValidator.PLAYER_ID_LENGTH_MAXIMUM + "글자 이하이어야 합니다.";
@@ -79,7 +81,10 @@ AccountValidator.prototype.isValidPlayerPW = function(textPW) {
 }
 
 AccountValidator.prototype.messageForInvalidPlayerPW = function(textPW) {
-	if(textPW.length < Number(AccountValidator.PLAYER_PW_LENGTH_MINIMUM))
+	console.log(textPW);
+	if(typeof textPW == "undefined" || textPW == null || textPW == "")
+		return "학생 입장 번호를 입력해 주세요.";
+	else if(textPW.length < Number(AccountValidator.PLAYER_PW_LENGTH_MINIMUM))
 		return "학생 입장 번호는 " + AccountValidator.PLAYER_PW_LENGTH_MINIMUM + "자리 이상의 숫자로 입력해 주세요.";
 	else if(textPW.length > Number(AccountValidator.PLAYER_PW_LENGTH_MAXIMUM))
 		return "학생 입장 번호는 " + AccountValidator.PLAYER_PW_LENGTH_MAXIMUM + "자리 이하의 숫자로 입력해 주세요.";
diff --git a/src/web/server/player/get_entercode.php b/src/web/server/player/get_entercode.php
new file mode 100644
index 0000000..131e586
--- /dev/null
+++ b/src/web/server/player/get_entercode.php
@@ -0,0 +1,47 @@
+<?php
+header("Content-Type: application/json");
+
+include "./../lib/send_reply_json.php";
+include "./../setup/connect_db.php";
+
+$maestroID = $_POST["maestro_id"];
+$playerID = $_POST["player_id"];
+/*
+if(!is_numeric($enterCode)) {
+    send_error_code("생년월일이 숫자가 아닙니다. : ".$enterCode);
+    exit;
+} else if(strlen($enterCode) != 6) {
+    send_error_code("6자리 숫자값을 정확히 입력하세요 : YYMMDD (예 : 120131) : ".$enterCode);
+    exit;
+}
+*/
+
+
+$enterCode = getEnterCode($maestroID, $playerID);
+if($enterCode == NULL) {
+	set_error_message("입장 코드 정보가 없습니다.");
+	send_result_fail();
+	exit;
+}
+
+set_data("EnterCode", $enterCode);
+send_result_success();
+exit;
+
+
+function getEnterCode($maestroID, $playerID) {
+	global $db_conn;
+
+	$query = "SELECT EnterCode FROM player WHERE MaestroID=? AND PlayerID=?";
+	$stmt = $db_conn->prepare($query);
+	$stmt->bind_param("ii", $maestroID, $playerID);
+	$stmt->execute();
+	$stmt->bind_result($enterCode);
+	// while($stmt->fetch())
+	$stmt->fetch();
+	$stmt->close();
+
+	return $enterCode;
+}
+
+?>
\ No newline at end of file