diff --git a/src/web/main/index.html b/src/web/main/index.html
index 7176f89..7c839ac 100644
--- a/src/web/main/index.html
+++ b/src/web/main/index.html
@@ -11,6 +11,9 @@
 	<script type="text/javascript" src="./../../../resources/jquery/jquery-3.3.1.min.js"></script>
 	<script type="text/javascript">
 		$(document).ready(function() {
+			if(sessionStorage.getItem("maestroID") !== null)
+				location.href = './../maestro/main_menu.html';
+
 			$("#home").click(function(event) {
 				console.log("home clicked");
 			})
diff --git a/src/web/module/header.html b/src/web/module/header.html
index 65ff9a1..60bc8e4 100644
--- a/src/web/module/header.html
+++ b/src/web/module/header.html
@@ -3,12 +3,14 @@
 		<a href="./../main/index.html" id="home" class="btn btn-orange" style="padding: 20px;">첫 화면</a>
 	</span>
 
+	<div style="width: 100%; text-align: right;" >
 	<span class="col alignRight">
 		<a href="./../maestro/login.html" id="login_maestro" class="btn btn-sea">마에스트로<br/>로그인</a>
 	</span>
 
 	<span class="col alignRight">
-		<a href="./../client/login.html" target="_blank" id="login_player" class="btn btn-rouge" style="padding: 20px;">학생 연습</a>
+		<a href="#" target="_blank" id="login_player" class="btn btn-rouge" style="padding: 20px;">학생 연습</a>
 	</span>
+	</div>
 
 </div>
diff --git a/src/web/module/maestro_header.html b/src/web/module/maestro_header.html
index e5aba10..08e8a83 100644
--- a/src/web/module/maestro_header.html
+++ b/src/web/module/maestro_header.html
@@ -1,11 +1,21 @@
-<div class="container">
+<script>
+
+function logout() {
+	sessionStorage.clear();
+	location.href = './../main/index.html';
+}
+
+</script>
+
+
+<div class="container">
 
 	<span class="col two">
 		<a href="./../main/index.html" id="home" class="btn btn-orange" style="padding: 1.1em;">첫 화면</a>
 	</span>
 
 	<span class="col two" style="float: right;">
-		<a href="#" id="logout_maestro" class="btn btn-sea">마에스트로<br/>로그아웃</a>
+		<a href="#" id="logout_maestro" class="btn btn-sea" onClick="logout()">마에스트로<br/>로그아웃</a>
 	</span>
 
 	<span class="col two" style="float: right;">
diff --git a/src/web/module/maestro_section_login.html b/src/web/module/maestro_section_login.html
index 54e4dcf..b9bddab 100644
--- a/src/web/module/maestro_section_login.html
+++ b/src/web/module/maestro_section_login.html
@@ -10,30 +10,58 @@
 }
 </style>
 
+<script>
+
+function login() {
+	let name = $("#maestro_name").val();
+	let password = $("#password").val();
+
+	let xhr = new XMLHttpRequest(); //new로 생성.
+	xhr.open('POST', './../server/maestro/login.php', true);
+	xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
+	xhr.send("maestro_name=" + name + "&password=" + password);
+
+	//응답
+	xhr.onload = function() {
+		if(xhr.readyState === 4 && xhr.status === 200) {
+			let replyJSON = JSON.parse(xhr.responseText);
+			// console.log(replyJSON);
+
+			// if(replyJSON !== null)
+			// 	console.log(replyJSON);
+
+			// if(replyJSON["MaestroID"] !== undefined)
+			// 	console.log(replyJSON["MaestroID"]);
+
+			if(replyJSON !== null && replyJSON["MaestroID"] !== undefined && replyJSON["MaestroID"] !== null) {
+				sessionStorage.setItem("maestroID", replyJSON["MaestroID"]);
+				location.href = './../maestro/main_menu.html';
+			} else {
+				$("#error_message").val(replyJSON["ERROR"]);
+			}
+		}
+	}
+}
+</script>
 
 
 <div class="container">
 	<div class="login">
 
-		<div>1</div>
-		<div>2</div>
-		<div>3</div>
-		<div>4</div>
-		<div>5</div>
-
 		<div>
-		<form action="/action_page.php" method="get" id="maestro_login">
 			마에스트로 아이디
-			<input type="text" name="maestro_id"><br/>
+			<input type="text" id="maestro_name" name="maestro_name"><br/>
 			암호
-			<input type="password" name="maestro_id"><br/>
-		</form>
+			<input type="password" id="password" name="password"><br/>
 		</div>
 
 		<div class="col alignCenter">
-			<a href="./../maestro/main_menu.html" id="faq" class="btn btn-sea width400">로그인</a>
+			<a id="login" class="btn btn-sea width400" onClick="login()">로그인</a>
 		</div>
 
+		<textarea id="error_message">
+		</textarea>
+
 	</div>
 
 
@@ -41,7 +69,7 @@
 	<div class="register">
 
 		<div class="col alignCenter" style="float: center;">
-			<a href="./../maestro/register.html" id="faq" class="btn btn-sea width400">마에스트로<br/>가입</a>
+			<a href="./../maestro/register.html" id="register" class="btn btn-sea width400">마에스트로<br/>가입</a>
 		</div>
 
 		<ol>
diff --git a/src/web/server/maestro/login.php b/src/web/server/maestro/login.php
new file mode 100644
index 0000000..e2ae411
--- /dev/null
+++ b/src/web/server/maestro/login.php
@@ -0,0 +1,71 @@
+<?php
+header('Content-Type: application/json');
+
+$maestro_name = $_POST["maestro_name"];
+$password = $_POST["password"];
+/*
+if(!is_numeric($enterCode)) {
+    send_error_code('생년월일이 숫자가 아닙니다. : '.$enterCode);
+    exit;
+} else if(strlen($enterCode) != 6) {
+    send_error_code('6자리 숫자값을 정확히 입력하세요 : YYMMDD (예 : 120131) : '.$enterCode);
+    exit;
+}
+*/
+
+include "./../setup/connect_db.php";
+
+$maestro_id = get_maestro_id($maestro_name);
+if($maestro_id === null) {
+	$replyJSON["ERROR"] = "마에스트로 아이디가 없습니다";
+	echo json_encode($replyJSON, JSON_UNESCAPED_UNICODE);
+	$db_conn->close();
+	exit;
+}
+
+$replyJSON = login($maestro_name, $password);
+if($replyJSON === null || $replyJSON[MaestroID] === null) {
+	$replyJSON["ERROR"] = "비밀번호를 잘못 입력하셨습니다.";
+	echo json_encode($replyJSON, JSON_UNESCAPED_UNICODE);
+	$db_conn->close();
+	exit;
+}
+
+echo json_encode($replyJSON, JSON_UNESCAPED_UNICODE);
+$db_conn->close();
+exit;
+
+function get_maestro_id($maestro_name) {
+	global $db_conn;
+
+	$query = "SELECT MaestroID FROM moty_maestro WHERE Name=?";
+	$stmt = $db_conn->prepare($query);
+	$stmt->bind_param('s', $maestro_name);
+	$stmt->execute();
+	$stmt->bind_result($maestro_id);
+	// while($stmt->fetch()) {
+	// 	;
+	// }
+	$stmt->fetch();
+	$stmt->close();
+
+	return $maestro_id;
+}
+
+function login($maestro_name, $password) {
+	global $db_conn;
+
+	$query = "SELECT MaestroID FROM moty_maestro WHERE Name=? AND Password=?";
+	$stmt = $db_conn->prepare($query);
+	$stmt->bind_param('ss', $maestro_name, $password);
+	$stmt->execute();
+	$stmt->bind_result($maestro_id);
+	// while($stmt->fetch())
+	$stmt->fetch();
+	$stmt->close();
+
+	$replyJSON["MaestroID"] = $maestro_id;
+	return $replyJSON;
+}
+
+?>
\ No newline at end of file
diff --git a/src/web/server/setup/connect_db.php b/src/web/server/setup/connect_db.php
index b04c293..d4002d9 100644
--- a/src/web/server/setup/connect_db.php
+++ b/src/web/server/setup/connect_db.php
@@ -24,8 +24,8 @@ $result = mysqli_query($db_conn, $query);
 
 function send_error_message($replyJSON, $error_message) {
 	$replyJSON["ERROR"] = $error_message;
-	$db_conn->close();
 	echo json_encode($replyJSON, JSON_UNESCAPED_UNICODE);
+	$db_conn->close();
 }
 
 ?>
\ No newline at end of file
diff --git a/src/web/sql/make_db.sql b/src/web/sql/make_db.sql
index 65158b8..a8c63cf 100644
--- a/src/web/sql/make_db.sql
+++ b/src/web/sql/make_db.sql
@@ -1,7 +1,7 @@
 CREATE TABLE moty_maestro (
 	MaestroID INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
 	Name CHAR(50) NOT NULL,
-	EnterCode CHAR(10) NOT NULL,
+	Password CHAR(10) NOT NULL,
 	Email CHAR(50) NOT NULL,
 	AccountType INT UNSIGNED NOT NULL,
 	AccountStatus INT UNSIGNED NOT NULL,