diff --git a/src/web/admin/admin_extension_list.html b/src/web/admin/admin_extension_list.html
index c2a3b65..0b1db3b 100644
--- a/src/web/admin/admin_extension_list.html
+++ b/src/web/admin/admin_extension_list.html
@@ -92,7 +92,7 @@
 						+ "	<input type='text' class='maestro_id d-none' disabled value='" + jsonList[i].maestroID + "'>"
 						+ "	<input type='text' class='maestro_name col-sm' disabled value='" + jsonList[i].maestroName + "'>"
 						+ "	<input type='text' class='registered_account_type col-sm text-right' disabled value='" + accountType(jsonList[i].registeredAccountType) + "'>"
-						+ "	<input type='text' class='col-sm text-right' disabled value='" + jsonList[i].availableActivateDateTime.substring(0, 10) + "'>"
+						+ "	<input type='text' class='availableDate col-sm text-right' disabled value='" + jsonList[i].availableActivateDateTime.substring(0, 10) + "'>"
 						// + "	<input type='text' class='new_account_type col-sm text-right' disabled value='" + accountType(jsonList[i].requestedAccountType) + "'>"
 						+ "	<input type='text' class='col-sm text-right' disabled value='" + jsonList[i].requestedDateTime.substring(0, 10) + "'>"
 						// + "	<input type='text' class='col-sm text-right' disabled value='" + NumberUtil.numberWithCommas(price(jsonList[i].requestedAccountType, jsonList[i].registeredAccountType)) + "'>"
@@ -107,7 +107,7 @@
 						+ "	<input type='text' class='maestro_id d-none' disabled value='" + jsonList[i].maestroID + "'>"
 						+ "	<input type='text' class='maestro_name col-sm text-success' disabled value='" + jsonList[i].maestroName + "'>"
 						+ "	<input type='text' class='registered_account_type col-sm text-right text-success' disabled value='" + accountType(jsonList[i].registeredAccountType) + "'>"
-						+ "	<input type='text' class='col-sm text-right' disabled value='" + jsonList[i].availableActivateDateTime.substring(0, 10) + "'>"
+						+ "	<input type='text' class='availableDate col-sm text-right' disabled value='" + jsonList[i].availableActivateDateTime.substring(0, 10) + "'>"
 						// + "	<input type='text' class='new_account_type col-sm text-right text-success' disabled value='" + accountType(jsonList[i].requestedAccountType) + "'>"
 						+ "	<input type='text' class='col-sm text-success text-right' disabled value='" + jsonList[i].requestedDateTime.substring(0, 10) + "'>"
 						// + "	<input type='text' class='col-sm text-success' disabled value='" + NumberUtil.numberWithCommas(price(jsonList[i].requestedAccountType, jsonList[i].registeredAccountType)) + "'>"
@@ -141,6 +141,7 @@
 			var maestroExtensionID;
 			var maestroID;
 			var maestroName;
+			var availableDate;
 			var registeredAccountType;
 			for (var i=0; i < children.length; i++) {
 				// console.log(children);
@@ -156,20 +157,41 @@
 				} else if (children[i].className == "maestro_name col-sm text-success") {
 					maestroName = children[i].value;
 					continue;
+				} else if (children[i].className == "availableDate col-sm text-right") {
+					availableDate = children[i].value;
+					continue;
 				} else if (children[i].className == "registered_account_type col-sm text-right") {
 					registeredAccountType = accountTypeValue(children[i].value);
 					continue;
 				}
 			}
-			console.log(maestroExtensionID);
-			console.log(maestroID);
-			console.log(maestroName);
-			console.log(registeredAccountType);
-			return;
+			var availableDateArray = availableDate.split("-");
+			// console.log("year : " + availableDateArray[0]);
+			// console.log("month : " + availableDateArray[1]);
+			// console.log("day : " + availableDateArray[2]);
+			var endDate = new Date(availableDateArray[0], availableDateArray[1] - 1, availableDateArray[2]);
+			// console.log("endDate : " + endDate);
+			var newDate = new Date(endDate.setFullYear(endDate.getFullYear() + 1));
+			// console.log("newDate : " + newDate);
+			var newAvailableDate = newDate.toISOString().substring(0, 10);
+			// console.log("newAvailableDate : " + newAvailableDate);
+
+			// console.log(maestroExtensionID);
+			// console.log(maestroID);
+			// console.log(maestroName);
+			// // console.log(availableDate);
+			// console.log(newAvailableDate);
+			// console.log(registeredAccountType);
+			// return;
 
 			sendRequestServer(	//url, sendParams, onSuccess, onFail, isDebugMode);
 				"./../server/admin/extension_maestro.php",
-				"maestro_extension_id=" + maestroExtensionID + "&maestro_id=" + maestroID + + "&maestro_name=" + maestroName + "&registered_account_type=" + registeredAccountType,
+				// $maestro_name, $new_available_date, $maestro_email
+				"maestro_extension_id=" + maestroExtensionID
+				+ "&maestro_id=" + maestroID
+				+ "&maestro_name=" + maestroName
+				+ "&new_available_date=" + newAvailableDate
+				+ "&registered_account_type=" + registeredAccountType,
 
 				function(jsonData) {
 					loadMaestroExtensionList("");
diff --git a/src/web/module/maestro_extension.html b/src/web/module/maestro_extension.html
index 509ebe3..0b07b90 100644
--- a/src/web/module/maestro_extension.html
+++ b/src/web/module/maestro_extension.html
@@ -1,6 +1,8 @@
 <script>
 
 var registeredAccountType = -1;
+var availableDate = "";
+var newAvailableDate = "";
 
 $(document).ready(function() {
 	loadMaestroInfo(maestroID);
@@ -34,6 +36,9 @@ function showEndDate(date) {
 	var today = new Date();
 	var endDay = new Date(endDate);
 	var diffDay = (endDay.getTime() - today.getTime()) / (1000 * 60 * 60 * 24);
+	availableDate = endDate;
+	var newDate = new Date(endDay.setFullYear(endDay.getFullYear() + 1));
+	newAvailableDate = newDate.toISOString().substring(0, 10);
 
 	$("#maestro_count_down_date").html("유효 기간 : ~ " + endDate + " <span id='countdown_day'>(남은 기간 : " + Math.ceil(diffDay) + "일)</span>");
 	if(diffDay < 30)
@@ -62,14 +67,24 @@ function showMaestroName(maestroName) {
 function extendMaestroAccount() {
 	// console.log("extend maestro account");
 
+	// console.log("maestroID : " + maestroID);
+	// console.log("availableDate : " + availableDate);
+	// console.log("newAvailableDate : " + newAvailableDate);
+	// console.log("registeredAccountType : " + registeredAccountType);
+	// return;
+
 	sendRequestServer(	//url, sendParams, onSuccess, onFail, isDebugMode);
 		"./../server/maestro/request_extension_maestro.php",
-		"maestro_id=" + maestroID + "&account_type=" + registeredAccountType,
+		// // $maestro_name, $available_date, $new_available_date, $maestro_email, $registered_account_type
+		"maestro_id=" + maestroID
+		+ "&available_date=" + availableDate
+		+ "&new_available_date=" + newAvailableDate
+		+ "&account_type=" + registeredAccountType,
 
 		(function(jsonData) {
 			// console.log(jsonData);
 			alert("연장 신청이 등록되었습니다.\n입금 확인과 처리에 시간이 조금 걸립니다. 양해 부탁드립니다.");
-			location.href="main_menu.html";
+			// location.href="main_menu.html";
 		}),
 
 		(function(errorMessage, errorCode) {
@@ -109,18 +124,28 @@ function extendMaestroAccount() {
 
 		<div class="card-header bg-light"><span class="h4">마에스트로 계정 연장 신청</span></div>
 		<div class="card-body">
-			<div class="mb-4">
-				<p>유효 기간을 <span class="text-primary">+1년 연장</span>합니다.</p>
+			<div class="px-2 mb-4">
+				<h5 class="card-title">유효 기간을 <span class="text-primary">+1년 연장</span>합니다.</h5>
+				<ul>
+					<li>만료일(<span id="end_day"></span>) 기준으로 1년이 추가됩니다.</li>
+					<li>연장 신청한 날짜, 입금한 날짜와는 무관합니다.</li>
+				</ul>
+
+				<h5 class="card-title">연장 신청 방법</h5>
 				<ol>
-					<li>
-						만료일(<span id="end_day"></span>) 기준으로 1년이 추가됩니다.<br/><span class="text-muted">(연장 신청한 날짜와는 무관합니다)</span>
-					</li>
+					<li>아래에 있는 연장 신청 버튼을 클릭하세요.</li>
 					<li>아래 내용을 참고하여 송금을 부탁드립니다.</li>
 					<li>송금 내역이 확인되는대로 연장 처리를 진행합니다.</li>
 				</ol>
 			</div>
 
-			<div class="card border-secondary bg-warning px-4 py-3 mx-2 mt-3 mb-3">
+			<div class="mx-2 mb-4">
+				<button type="button" class="btn btn-primary btn-block btn-lg" onclick="extendMaestroAccount();">연장 신청</button>
+			</div>
+
+			<div class="card bg-warning mx-2 mt-3 mb-2">
+				<div class="card-header"><span class="font-weight-bold">송금 정보</span></div>
+				<div class="card-body px-5">
 				<div class="row">
 					<label class="col-sm-3 col-form-label">* 카카오뱅크</label>
 					<label class="col-sm-9 col-form-label">3333-07-4977969 (예금주 : 박지상)</label>
@@ -138,13 +163,10 @@ function extendMaestroAccount() {
 						<small class="form-text text-muted">빠른 입금 확인과 계정 연장 처리 작업을 위해, 송금자명을 마에스트로 아이디로 입력 부탁드립니다.</small>
 					</div>
 				</div>
+				</div>
 			</div>
 
 		</div>
-
-		<div class="mx-4 mb-4">
-			<button type="button" class="btn btn-primary btn-block btn-lg" onclick="extendMaestroAccount();">연장 신청</button>
-		</div>
 	</div>
 
 
@@ -153,12 +175,12 @@ function extendMaestroAccount() {
 		<h4 class="mb-4">마에스트로 계정 연장 안내</h4>
 
 		<ol>
-			<li>계정 연장을 위한 송금 내용을 이메일로 발송했습니다.</li>
+			<li>위의 <kbd>연장 신청</kbd> 버튼을 누르면 계정 연장, 송금 안내 내용이 이메일로 자동 발송됩니다.</li>
 			<li>
 				입금 확인 및 적용을 수작업으로 하고 있습니다. 최대한 빨리 확인하고 적용할 수 있도록 노력하겠습니다.<br/>
 				<span class="text-muted">(보통 늦어도 반나절 이내에 처리됩니다)</span>
 			</li>
-			<li>유효 기간은 +1년씩만 연장할 수 있습니다.</li>
+			<li>유효 기간은 +1년씩만 연장 가능합니다.</li>
 			<li class="text-primary">계정 업그레이드를 하셔도 +1년 연장 효과가 적용됩니다.</li>
 		</ol>
 
diff --git a/src/web/server/admin/extension_maestro.php b/src/web/server/admin/extension_maestro.php
index 6612a51..001dc92 100644
--- a/src/web/server/admin/extension_maestro.php
+++ b/src/web/server/admin/extension_maestro.php
@@ -12,6 +12,7 @@ include "./../mail/send_mail.php";
 $maestro_extension_id = $_POST["maestro_extension_id"];
 $maestro_id = $_POST["maestro_id"];
 $maestro_name = $_POST["maestro_name"];
+$new_available_date = $_POST["new_available_date"];
 $registered_account_type = $_POST["registered_account_type"];
 
 extension_maestro($maestro_id);
@@ -20,7 +21,8 @@ change_extension_request_status_to_close($maestro_id);
 change_extension_request_status_to_applied($maestro_extension_id);
 
 $maestro_data = get_maestro_data($maestro_id);
-// sendMailExtensionDone($maestro_data["name"], $maestro_data["email"], $registered_account_type);
+// $maestro_name, $new_available_date, $maestro_email
+sendMailExtensionDone($maestro_data["name"], $new_available_date, $maestro_data["email"]);
 insertMaestroLog("extension_maestro", $maestro_id, $maestro_name."(".$registered_account_type.")");
 
 // set_data("maestro_extension_id", $maestro_extension_id);
@@ -36,7 +38,7 @@ function extension_maestro($maestro_id) {
 
 	$query = "
 		UPDATE maestro
-		SET AccountType = ?, ActivateStatus = 1, AvailableActivateDateTime = DATE_ADD(NOW(), INTERVAL 1 YEAR)
+		SET ActivateStatus = 1, AvailableActivateDateTime = DATE_ADD(AvailableActivateDateTime, INTERVAL 1 YEAR)
 		WHERE MaestroID = ?;
 	";
 	$stmt = $db_conn->prepare($query);
diff --git a/src/web/server/maestro/request_extension_maestro.php b/src/web/server/maestro/request_extension_maestro.php
index 075d7ba..99d68d2 100644
--- a/src/web/server/maestro/request_extension_maestro.php
+++ b/src/web/server/maestro/request_extension_maestro.php
@@ -9,6 +9,8 @@ include "./../mail/mail_setting.php";
 include "./../mail/send_mail.php";
 
 $maestro_id = $_POST["maestro_id"];
+$available_date = $_POST["available_date"];
+$new_available_date = $_POST["new_available_date"];
 $account_type = $_POST["account_type"];
 
 
@@ -32,7 +34,8 @@ if($countUpgrade === null || $countUpgrade < 1) {
 }
 
 $maestro_data = get_maestro_data($maestro_id);
-// sendMailExtensionBankInfo($maestro_data["name"], $maestro_data["email"], $account_type);
+// $maestro_name, $available_date, $new_available_date, $maestro_email, $registered_account_type
+sendMailExtensionBankInfo($maestro_data["name"], $available_date, $new_available_date, $maestro_data["email"], $account_type);
 
 send_result_success();
 exit;