diff --git a/src/web/module/maestro_extension.html b/src/web/module/maestro_extension.html
index a053466..509ebe3 100644
--- a/src/web/module/maestro_extension.html
+++ b/src/web/module/maestro_extension.html
@@ -63,7 +63,7 @@ function extendMaestroAccount() {
 	// console.log("extend maestro account");
 
 	sendRequestServer(	//url, sendParams, onSuccess, onFail, isDebugMode);
-		"./../server/maestro/request_extend_maestro.php",
+		"./../server/maestro/request_extension_maestro.php",
 		"maestro_id=" + maestroID + "&account_type=" + registeredAccountType,
 
 		(function(jsonData) {
diff --git a/src/web/server/maestro/request_extension_maestro.php b/src/web/server/maestro/request_extension_maestro.php
new file mode 100644
index 0000000..075d7ba
--- /dev/null
+++ b/src/web/server/maestro/request_extension_maestro.php
@@ -0,0 +1,73 @@
+<?php
+header("Content-Type: application/json");
+
+include "./../setup/connect_db.php";
+include "./../lib/send_reply_json.php";
+include "./../lib/db_maestro.php";
+include "./../lib/maestro_account_info.php";
+include "./../mail/mail_setting.php";
+include "./../mail/send_mail.php";
+
+$maestro_id = $_POST["maestro_id"];
+$account_type = $_POST["account_type"];
+
+
+// $maestro_id = has_maestro_name($maestro_name);
+// if($maestro_id !== null) {
+// 	set_error_message($maestro_name." : 이미 등록된 마에스트로 계정입니다.");
+// 	send_result_fail();
+// 	exit;
+// }
+
+add_maestro_extension($maestro_id, $account_type);
+
+// simplely check if maestro upgrade db added or not
+$countUpgrade = count_maestro_extension($maestro_id);
+if($countUpgrade === null || $countUpgrade < 1) {
+	// $maestro_data = get_maestro_data($maestro_id);
+	// set_error_message($maestro_data["name"]." : 알 수 없는 이유로 마에스트로 계정 업그레이드 요청이 취소되었습니다.");
+	set_error_message("알 수 없는 이유로 마에스트로 계정 업그레이드 요청이 취소되었습니다.");
+	send_result_fail();
+	exit;
+}
+
+$maestro_data = get_maestro_data($maestro_id);
+// sendMailExtensionBankInfo($maestro_data["name"], $maestro_data["email"], $account_type);
+
+send_result_success();
+exit;
+
+
+
+function count_maestro_extension($maestro_id) {
+	global $db_conn;
+
+	$query = "
+		SELECT COUNT(MaestroID)
+		FROM maestro_extension
+		WHERE MaestroID = ?
+	";
+	$stmt = $db_conn->prepare($query);
+	$stmt->bind_param("i", $maestro_id);
+	$stmt->execute();
+	$stmt->bind_result($countUpgrade);
+	// while($stmt->fetch())
+	$stmt->fetch();
+	$stmt->close();
+
+	return $countUpgrade;
+}
+
+function add_maestro_extension($maestro_id, $account_type) {
+	global $db_conn;
+
+	$query = "
+		INSERT INTO maestro_extension (AccountType, RequestedDateTime, Status, MaestroID)
+		VALUES (?, NOW(), 1, ?);
+	";
+	$stmt = $db_conn->prepare($query);
+	$stmt->bind_param("ii", $account_type, $maestro_id);
+	$stmt->execute();
+}
+
+?>
\ No newline at end of file