diff --git a/src/web/admin/admin_register_list.html b/src/web/admin/admin_register_list.html
index 08aa4c6..326eeb2 100644
--- a/src/web/admin/admin_register_list.html
+++ b/src/web/admin/admin_register_list.html
@@ -11,9 +11,7 @@
 
 	<script type="text/javascript" src="./../../../resources/jquery/jquery-3.3.1.min.js"></script>
 	<script type="text/javascript" src="./../js/main.js"></script>
-	<script type="text/javascript" src="./../js/maestro_list_manager.js"></script>
-	<script type="text/javascript" src="./../js/maestro_list.js"></script>
-	<script type="text/javascript" src="./../js/maestro_list_navigator.js"></script>
+	<script type="text/javascript" src="./../js/request_server.js"></script>
 	<script type="text/javascript">
 		$(document).ready(function() {
 			$("#header").load("admin_header.html");
@@ -32,45 +30,22 @@
 			loadMaestroList(maestroName);
 		}
 
-		function loadMaestroList($maestroName) {
-			let xhr = new XMLHttpRequest();
-			xhr.open('POST', './../server/admin/registered_maestro_list.php', true);
-			xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-			xhr.send("maestro_name=" + $maestroName);
-			xhr.onload = function() {
-				if(xhr.readyState === 4 && xhr.status === 200) {
-					// console.log(xhr.responseText);
-					// console.log(xhr.responseText.length);
-					if(xhr.responseText.length === 0 || xhr.responseText === null) {
-						console.log("no data from server");
-						$("#error_message").text("서버에서 요청을 수행하지 못했습니다.");
-						return;
+		function loadMaestroList(maestroName) {
+			sendRequestServer(	//url, sendParams, onSuccess, onFail, isDebugMode);
+				"./../server/admin/registered_maestro_list.php",
+				"maestro_name=" + maestroName,
+
+				(jsonData) => {
+					updateMaestroList(jsonData["maestroList"]);
+				},
+
+				(errorMessage) => {
+					if($("#error_message").length) {
+						$("#error_message").text(errorMessage);
 					}
-
-					let replyJSON = JSON.parse(xhr.responseText);
-					// console.log(replyJSON);
-
-					if(replyJSON === null) {
-						console.log("no data from server");
-						$("#error_message").text("서버에서 데이터가 넘어오지 않았습니다.");
-						return;
-					}
-
-					if(replyJSON["ERROR"] !== undefined || replyJSON["RESULT"] === undefined) {
-						console.log(replyJSON["ERROR"]);
-						$("#error_message").text(replyJSON["ERROR"]);
-						return;
-					}
-
-					if(replyJSON["RESULT"] === "fail") {
-						console.log(replyJSON["RESULT"]);
-						$("#error_message").text(replyJSON["ERROR"]);
-						return;
-					}
-
-					updateMaestroList(replyJSON["MaestroList"]);
 				}
-			}
+
+			);
 
 		}
 
@@ -99,9 +74,9 @@
 			for(let i = 0; i < jsonList.length; i++) {
 				$("#maestro_list_result_contents").append(
 					"<li class='search_result_list'>"
-					+ "	<span class='maestro_id hide'>" + jsonList[i].MaestroID + "</span>"
-					+ "	<input type='text' value='" + jsonList[i].Name + "' class='maestro_name'>"
-					+ "	<input type='text' value='" + jsonList[i].AccountType + "' class='maestro_account_type'>"
+					+ "	<span class='maestro_id hide'>" + jsonList[i].maestroID + "</span>"
+					+ "	<input type='text' value='" + jsonList[i].maestroName + "' class='maestro_name'>"
+					+ "	<input type='text' value='" + jsonList[i].accountType + "' class='maestro_account_type'>"
 					+ "	<input type='button' class='maestro_register' value='등록' onClick='register(this)'>"
 					+ "</li>"
 				);
@@ -112,65 +87,32 @@
 			$("#maestro_list_result_contents").append("</ul>");
 		}
 
-		function getClickedObjectID(clickedObject) {
-			let tagDiv = $(clickedObject).closest(".player_list");
-			let tagDivID = tagDiv.prop("id");
-			// console.log(tagDivIDName);
-
-			return tagDivID;
-		}
-
 		function register(inputButton) {
-			console.log(inputButton);
-
-
 			let id = $(inputButton).siblings(".maestro_id");
 			let maestroID = id.text();
-			console.log(maestroID);
+			// console.log(maestroID);
 
-			let name = $(inputButton).siblings(".maestro_name");
-			let maestroName = name.val();
-			console.log(maestroName);
+			// let name = $(inputButton).siblings(".maestro_name");
+			// let maestroName = name.val();
+			// console.log(maestroName);
 
-			let xhr = new XMLHttpRequest(); //new로 생성.
-			xhr.open('POST', './../server/admin/register_maestro.php', true);
-			xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-			xhr.send("maestro_id=" + maestroID);
-			xhr.onload = function() {
-				if(xhr.readyState === 4 && xhr.status === 200) {
-					// console.log(xhr.responseText);
-					// console.log(xhr.responseText.length);
-					if(xhr.responseText.length === 0 || xhr.responseText === null) {
-						console.log("no data from server");
-						$("#error_message").text("서버에서 요청을 수행하지 못했습니다.");
-						return;
-					}
 
-					let replyJSON = JSON.parse(xhr.responseText);
-					// console.log(replyJSON);
-
-					if(replyJSON === null) {
-						console.log("no data from server");
-						$("#error_message").text("서버에서 데이터가 넘어오지 않았습니다.");
-						return;
-					}
-
-					if(replyJSON["ERROR"] !== undefined || replyJSON["RESULT"] === undefined) {
-						console.log(replyJSON["ERROR"]);
-						$("#error_message").text(replyJSON["ERROR"]);
-						return;
-					}
-
-					if(replyJSON["RESULT"] === "fail") {
-						console.log(replyJSON["RESULT"]);
-						$("#error_message").text(replyJSON["ERROR"]);
-						return;
-					}
+			sendRequestServer(	//url, sendParams, onSuccess, onFail, isDebugMode);
+				"./../server/admin/register_maestro.php",
+				"maestro_id=" + maestroID,
 
+				(jsonData) => {
 					loadMaestroList("");
 					$("#error_message").text("마에스트로 계정이 정상적으로 등록되었습니다.");
+				},
+
+				(errorMessage) => {
+					if($("#error_message").length) {
+						$("#error_message").text(errorMessage);
+					}
 				}
-			}
+
+			);
 		}
 
 	</script>
diff --git a/src/web/admin/login.html b/src/web/admin/login.html
index 5562e99..1a006d7 100644
--- a/src/web/admin/login.html
+++ b/src/web/admin/login.html
@@ -22,14 +22,14 @@
 			let name = $("#maestro_name").val();
 			let password = $("#password").val();
 
-
 			sendRequestServer(	//url, sendParams, onSuccess, onFail, isDebugMode);
 				"./../server/maestro/login.php",
 				"maestro_name=" + name + "&password=" + password,
 
 				(jsonData) => {
-					maestroID = jsonData["MaestroID"];
+					maestroID = jsonData["maestroID"];
 					sessionStorage.setItem("maestroID", maestroID);
+
 					location.href = 'admin_register_list.html';
 				},
 
diff --git a/src/web/js/maestro_list.js b/src/web/js/maestro_list.js
deleted file mode 100644
index 24c600e..0000000
--- a/src/web/js/maestro_list.js
+++ /dev/null
@@ -1,86 +0,0 @@
-class MaestroListRow {
-
-	constructor(maestroID, maestroName, password, editButton, deleteButton) {
-		this.maestroID = maestroID;
-		this.maestroName = maestroName;
-		this.password = password;
-		this.editButton = editButton;
-		this.deleteButton = deleteButton;
-	}
-
-}
-
-class MaestroList {
-
-	constructor(tagDiv, parent) {
-		let self = this;
-		this.parent = parent;
-		// console.log(tagDiv);
-
-		this.maestroCount = 0;
-		this.activePageNo = 1;
-
-		let id_list = tagDiv.find(".maestro_id");
-		// console.log(id_list);
-
-		this.listRows = new Array();
-		for(let i = 0; i < id_list.length; i++) {
-			this.listRows[i] = new PaestroListRow(
-				id_list[i],	// span
-				$(id_list[i]).siblings(".maestro_name"),
-				$(id_list[i]).siblings(".maestro_password"),
-				$(id_list[i]).siblings(".maestro_edit"),
-				$(id_list[i]).siblings(".maestro_delete")
-			);
-
-			this.disableItem(this.listRows[i]);
-
-			$(id_list[i]).siblings(".maestro_edit").click(function() {
-				parent.editMaestro(this);
-			})
-
-			$(id_list[i]).siblings(".maestro_delete").click(function() {
-				parent.deleteMaestro(this);
-			})
-			// console.log(this.listRows[i].maestroName.val());
-			// console.log(this.listRows[i]);
-		}
-	}
-
-	disableItem(item) {
-		$(item.maestroID).empty();
-		$(item.maestroName).prop("disabled", true);
-		$(item.password).prop("disabled", true);
-		$(item.editButton).prop("disabled", true);
-		$(item.deleteButton).prop("disabled", true);
-	}
-
-	enableItem(item) {
-		$(item.maestroName).prop("disabled", false);
-		$(item.password).prop("disabled", false);
-		$(item.editButton).prop("disabled", false);
-		$(item.deleteButton).prop("disabled", false);
-	}
-
-	updatemaestroList(jsonData) {
-		// console.log(jsonData);
-
-		for(let i = 0; i < 10; i++) {
-			$(this.listRows[i].maestroID).empty();
-
-			if(i < jsonData.length) {
-				$(this.listRows[i].maestroID).append(jsonData[i]["maestroID"]);
-				$(this.listRows[i].maestroName).val(jsonData[i]["Name"]);
-				$(this.listRows[i].password).val(jsonData[i]["Password"]);
-
-				this.enableItem(this.listRows[i]);
-			} else {
-				$(this.listRows[i].maestroName).val("");
-				$(this.listRows[i].password).val("");
-
-				this.disableItem(this.listRows[i]);
-			}
-		}
-	}
-
-}
\ No newline at end of file
diff --git a/src/web/js/maestro_list_manager.js b/src/web/js/maestro_list_manager.js
deleted file mode 100644
index 9f6f933..0000000
--- a/src/web/js/maestro_list_manager.js
+++ /dev/null
@@ -1,411 +0,0 @@
-class MaestroListManager {
-
-	constructor(docList, docNav) {
-		let self = this;
-		this.docList = docList;
-		this.docNav = docNav;
-
-		this.list = new MaestroList(this.docList, this);
-		this.listNavigator = new MaestroListNavigator(this.docNav);
-
-		this.maestroCount = 0;
-		this.activePageNo = 1;
-		this.lastPageNo = 0;
-
-	}
-
-
-	setupRegisteredMaestroList() {
-		let self = this;
-
-		let xhr = new XMLHttpRequest(); //new로 생성.
-		xhr.open('POST', './../server/maestro/registered_maestro_count.php', true);
-		xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-		xhr.send("maestro_id=" + maestroID);
-		xhr.onload = function() {
-			if(xhr.readyState === 4 && xhr.status === 200) {
-				// console.log(xhr.responseText);
-				// console.log(xhr.responseText.length);
-				if(xhr.responseText.length === 0 || xhr.responseText === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				let replyJSON = JSON.parse(xhr.responseText);
-				// console.log(replyJSON);
-
-				if(replyJSON === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				if(replyJSON["ERROR"] !== undefined || replyJSON["RESULT"] === undefined) {
-					console.log(replyJSON["ERROR"]);
-					return;
-				}
-
-				if(replyJSON["RESULT"] === "fail") {
-					console.log(replyJSON["RESULT"]);
-					return;
-				}
-
-				self.maestroCount = replyJSON["Count"];
-				self.lastPageNo = Math.ceil( (self.maestroCount + 1) / 10 );
-				self.activePageNo = 1;
-
-				self.loadRegisteredMaestroListPage(self.activePageNo);
-				self.listNavigator.updateNavigator(self.activePageNo, self.lastPageNo);
-			}
-		}
-	}
-
-	loadRegisteredMaestroListPage(pageNo) {
-		self = this;
-		this.activePageNo = pageNo;
-
-		let pageIndex = pageNo - 1;
-		let startNo = pageIndex * 10;
-		let endNo = pageIndex * 10 + 9;
-
-		let xhr = new XMLHttpRequest(); //new로 생성.
-		xhr.open('POST', './../server/maestro/registered_maestro_list.php', true);
-		xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-		xhr.send("maestro_id=" + maestroID + "&start_no=" + startNo + "&end_no=" + endNo);
-		xhr.onload = function() {
-			if(xhr.readyState === 4 && xhr.status === 200) {
-				// console.log(xhr.responseText);
-				// console.log(xhr.responseText.length);
-				if(xhr.responseText.length === 0 || xhr.responseText === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				let replyJSON = JSON.parse(xhr.responseText);
-				// console.log(replyJSON);
-
-				if(replyJSON === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				if(replyJSON["ERROR"] !== undefined || replyJSON["RESULT"] === undefined) {
-					console.log(replyJSON["ERROR"]);
-					return;
-				}
-
-				if(replyJSON["RESULT"] === "fail") {
-					console.log(replyJSON["RESULT"]);
-					return;
-				}
-
-				// console.log(replyJSON["MaestroList"]);
-				// updateMaestroListPage(replyJSON["MaestroList"]);
-				self.list.updateMaestroList(replyJSON["MaestroList"]);
-
-				self.maestroCount = replyJSON["MaestroList"].length;
-			}
-		}
-	}
-
-
-	updateRegisteredMaestroListPage(pageNo) {
-		self = this;
-		this.maestroListPage = pageNo;
-
-		let pageIndex = pageNo - 1;
-		let startNo = pageIndex * 10;
-		let endNo = pageIndex * 10 + 9;
-
-		let xhr = new XMLHttpRequest(); //new로 생성.
-		xhr.open('POST', './../server/maestro/registered_maestro_list.php', true);
-		xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-		xhr.send("maestro_id=" + maestroID + "&start_no=" + startNo + "&end_no=" + endNo);
-		xhr.onload = function() {
-			if(xhr.readyState === 4 && xhr.status === 200) {
-				// console.log(xhr.responseText);
-				// console.log(xhr.responseText.length);
-				if(xhr.responseText.length === 0 || xhr.responseText === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				let replyJSON = JSON.parse(xhr.responseText);
-				// console.log(replyJSON);
-
-				if(replyJSON === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				if(replyJSON["ERROR"] !== undefined || replyJSON["RESULT"] === undefined) {
-					console.log(replyJSON["ERROR"]);
-					return;
-				}
-
-				if(replyJSON["RESULT"] === "fail") {
-					console.log(replyJSON["RESULT"]);
-					return;
-				}
-
-				// console.log(replyJSON["MaestroList"]);
-				self.list.updateMaestroList(replyJSON["MaestroList"]);
-
-				self.maestroCount = replyJSON["MaestroList"].length;
-				// console.log(self.maestroCount);
-				// self.lastPageNo = Math.ceil( (self.maestroCount + 1) / 10 );
-				// self.activePageNo = 1;
-
-				self.listNavigator.updateNavigator(self.activePageNo, self.lastPageNo);
-			}
-		}
-	}
-
-
-
-	setupUpgradeMaestroList(maestroName) {
-		let self = this;
-
-		let xhr = new XMLHttpRequest(); //new로 생성.
-		xhr.open('POST', './../server/maestro/search_maestro_count.php', true);
-		xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-		xhr.send("maestro_id=" + maestroID + "&maestro_name=" + maestroName);
-		xhr.onload = function() {
-			if(xhr.readyState === 4 && xhr.status === 200) {
-				// console.log(xhr.responseText);
-				// console.log(xhr.responseText.length);
-				if(xhr.responseText.length === 0 || xhr.responseText === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				let replyJSON = JSON.parse(xhr.responseText);
-				// console.log(replyJSON);
-
-				if(replyJSON === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				if(replyJSON["ERROR"] !== undefined || replyJSON["RESULT"] === undefined) {
-					console.log(replyJSON["ERROR"]);
-					return;
-				}
-
-				if(replyJSON["RESULT"] === "fail") {
-					console.log(replyJSON["RESULT"]);
-					return;
-				}
-
-				self.maestroCount = replyJSON["Count"];
-				self.lastPageNo = Math.ceil( (self.maestroCount + 1) / 10 );
-				self.activePageNo = 1;
-
-				self.updateSearchMaestroListPage(maestroName, 1);
-			}
-		}
-	}
-
-	updateUpgradeMaestroListPage(maestroName, pageNo) {
-		let self = this;
-		this.maestroListPage = pageNo;
-
-		let pageIndex = pageNo - 1;
-		let startNo = pageIndex * 10;
-		let endNo = pageIndex * 10 + 9;
-
-		let xhr = new XMLHttpRequest(); //new로 생성.
-		xhr.open('POST', './../server/maestro/search_maestro_list.php', true);
-		xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-		xhr.send("maestro_id=" + maestroID + "&maestro_name=" + maestroName + "&start_no=" + startNo + "&end_no=" + endNo);
-		xhr.onload = function() {
-			if(xhr.readyState === 4 && xhr.status === 200) {
-				// console.log(xhr.responseText);
-				// console.log(xhr.responseText.length);
-				if(xhr.responseText.length === 0 || xhr.responseText === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				let replyJSON = JSON.parse(xhr.responseText);
-				// console.log(replyJSON);
-
-				if(replyJSON === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				if(replyJSON["ERROR"] !== undefined || replyJSON["RESULT"] === undefined) {
-					console.log(replyJSON["ERROR"]);
-					return;
-				}
-
-				if(replyJSON["RESULT"] === "fail") {
-					console.log(replyJSON["RESULT"]);
-					return;
-				}
-
-				// console.log(replyJSON["MaestroList"]);
-				self.list.updateMaestroList(replyJSON["MaestroList"]);
-
-				self.maestroCount = replyJSON["MaestroList"].length;
-				// self.lastPageNo = Math.ceil( (self.maestroCount + 1) / 10 );
-				// self.activePageNo = 1;
-
-				self.listNavigator.updateNavigator(self.activePageNo, self.lastPageNo);
-			}
-		}
-	}
-
-
-	onClickMaestroListPage(pageNo) {
-		switch(pageNo) {
-			case "first":
-			this.activePageNo = 1;
-			self.loadAddMaestroListPage(self.activePageNo);
-			return;
-
-			case "prev":
-			if(this.activePageNo > 1)
-				this.activePageNo -= 1;
-			self.loadAddMaestroListPage(self.activePageNo);
-			return;
-
-			case "next":
-			if(this.activePageNo < this.lastPageNo)
-				this.activePageNo += 1;
-			self.loadAddMaestroListPage(self.activePageNo);
-			return;
-
-			case "last":
-			this.loadAddMaestroListPage(this.lastPageNo);
-			return;
-		}
-
-		this.activePageNo = pageNo;
-		self.loadAddMaestroListPage(self.activePageNo);
-	}
-
-
-	registMaestro(inputButton) {
-		// console.log(inputButton);
-		let clickedObjectID = this.getClickedObjectID(inputButton);
-
-
-		let id = $(inputButton).siblings(".maestro_id");
-		let maestroID = id.text();
-		// console.log(maestroID);
-
-		let name = $(inputButton).siblings(".maestro_name");
-		let maestroName = name.val();
-		// console.log(maestroName);
-
-		let enterCode = $(inputButton).siblings(".maestro_entercode");
-		let maestroEnterCode = enterCode.val();
-		// console.log(maestroEnterCode);
-
-		let xhr = new XMLHttpRequest(); //new로 생성.
-		xhr.open('POST', './../server/maestro/edit_maestro.php', true);
-		xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-		xhr.send("maestro_id=" + maestroID + "&maestro_id=" + maestroID + "&maestro_name=" + maestroName + "&enter_code=" + maestroEnterCode);
-		xhr.onload = function() {
-			if(xhr.readyState === 4 && xhr.status === 200) {
-				// console.log(xhr.responseText);
-				// console.log(xhr.responseText.length);
-				if(xhr.responseText.length === 0 || xhr.responseText === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				let replyJSON = JSON.parse(xhr.responseText);
-				// console.log(replyJSON);
-
-				if(replyJSON === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				if(replyJSON["ERROR"] !== undefined || replyJSON["RESULT"] === undefined) {
-					console.log(replyJSON["ERROR"]);
-					return;
-				}
-
-				if(replyJSON["RESULT"] === "fail") {
-					console.log(replyJSON["RESULT"]);
-					return;
-				}
-
-				console.log(clickedObjectID);
-				if(clickedObjectID === "registered_maestro_list") {
-					self.setupRegisteredMaestroList();
-				} else if(clickedObjectID === "search_maestro_list") {
-					let maestroName = $("#search_name").val();
-					self.setupUpdateMaestroList(maestroName);
-				}
-			}
-		}
-	}
-
-	deleteMaestro(inputButton) {
-		let self = this;
-
-		let id = $(inputButton).siblings(".maestro_id");
-		let maestroID = id.text();
-
-		let clickedObjectID = this.getClickedObjectID(inputButton);
-
-		if(maestroID === null || maestroID === "")
-			return;
-
-		let xhr = new XMLHttpRequest(); //new로 생성.
-		xhr.open('POST', './../server/maestro/delete_maestro.php', true);
-		xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-		xhr.send("maestro_id=" + maestroID + "&maestro_id=" + maestroID);
-		xhr.onload = function() {
-			if(xhr.readyState === 4 && xhr.status === 200) {
-				// console.log(xhr.responseText);
-				// console.log(xhr.responseText.length);
-				if(xhr.responseText.length === 0 || xhr.responseText === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				let replyJSON = JSON.parse(xhr.responseText);
-				// console.log(replyJSON);
-
-				if(replyJSON === null) {
-					console.log("no data from server");
-					return;
-				}
-
-				if(replyJSON["ERROR"] !== undefined || replyJSON["RESULT"] === undefined) {
-					console.log(replyJSON["ERROR"]);
-					return;
-				}
-
-				if(replyJSON["RESULT"] === "fail") {
-					console.log(replyJSON["RESULT"]);
-					return;
-				}
-
-				console.log(clickedObjectID);
-				if(clickedObjectID === "registered_maestro_list") {
-					self.setupRegisteredMaestroList();
-				} else if(clickedObjectID === "upgrade_maestro_list") {
-					let maestroName = $("#search_name").val();
-					self.setupUpgradeMaestroList(maestroName);
-				}
-			}
-		}
-	}
-
-	getClickedObjectID(clickedObject) {
-		let tagDiv = $(clickedObject).closest(".maestro_list");
-		let tagDivID = tagDiv.prop("id");
-		// console.log(tagDivIDName);
-
-		return tagDivID;
-	}
-
-
-
-}
\ No newline at end of file
diff --git a/src/web/js/maestro_list_navigator.js b/src/web/js/maestro_list_navigator.js
deleted file mode 100644
index 1255f79..0000000
--- a/src/web/js/maestro_list_navigator.js
+++ /dev/null
@@ -1,54 +0,0 @@
-class MaestroListNavigator {
-
-	constructor(pageNoArea) {
-		let self = this;
-		this.pageNoArea = pageNoArea;
-		// console.log(parent);
-
-		this.activePageNo = 1;
-		this.lastPageNo = 1;
-	}
-
-	updateNavigator(activePageNo, lastPageNo) {
-		this.activePageNo = activePageNo;
-		this.lastPageNo = lastPageNo;
-		// this.lastPageNo = Math.ceil( (maestroCount + 1) / 10 );
-
-		$(this.pageNoArea).empty();
-
-		for(let pageNo = 1; pageNo < this.lastPageNo + 1; pageNo++) {
-			$(this.pageNoArea).append(
-				"<a onClick='onClickMaestroListPage(this, " + pageNo + ")'> " + pageNo + " </a>"
-			);
-		}
-	}
-
-	onClickMaestroListPage(pageNo) {
-		switch(pageNo) {
-			case "first":
-			this.activePageNo = 1;
-			this.maestroList.loadMaestroListPage(this.activePageNo);
-			return;
-
-			case "prev":
-			if(this.activePageNo > 1)
-				this.activePageNo -= 1;
-			this.maestroList.loadMaestroListPage(this.activePageNo);
-			return;
-
-			case "next":
-			if(this.activePageNo < this.lastPageNo)
-				this.activePageNo += 1;
-			this.maestroList.loadMaestroListPage(this.activePageNo);
-			return;
-
-			case "last":
-			this.maestroList.loadMaestroListPage(this.lastPageNo);
-			return;
-		}
-
-		this.activePageNo = pageNo;
-		this.maestroList.loadMaestroListPage(this.activePageNo);
-	}
-
-}
\ No newline at end of file
diff --git a/src/web/server/admin/register_maestro.php b/src/web/server/admin/register_maestro.php
index 64525ea..0965053 100644
--- a/src/web/server/admin/register_maestro.php
+++ b/src/web/server/admin/register_maestro.php
@@ -1,23 +1,24 @@
 <?php
-header('Content-Type: application/json');
+header("Content-Type: application/json");
+
+include "./../lib/send_reply_json.php";
+include "./../setup/connect_db.php";
 
 $maestro_id = $_POST["maestro_id"];
 
-include "./../setup/connect_db.php";
 
 $query = "UPDATE moty_maestro SET ActivateStatus=1 WHERE MaestroID=?";
 $stmt = $db_conn->prepare($query);
-$stmt->bind_param('i', $maestro_id);
+$stmt->bind_param("i", $maestro_id);
 $stmt->execute();
 
 if($stmt->affected_rows <= 0) {
-	send_error_message($replyJSON, "마에스트로 계정 활성화 실패");
-	$db_conn->close();
+	set_error_message("마에스트로 계정 활성화 실패");
+	send_result_fail();
 	exit;
 }
 
-$replyJSON["RESULT"] = "ok";
-echo json_encode($replyJSON, JSON_UNESCAPED_UNICODE);
-$db_conn->close();
+send_result_success();
+exit;
 
 ?>
\ No newline at end of file
diff --git a/src/web/server/admin/registered_maestro_list.php b/src/web/server/admin/registered_maestro_list.php
index e24e929..832282c 100644
--- a/src/web/server/admin/registered_maestro_list.php
+++ b/src/web/server/admin/registered_maestro_list.php
@@ -1,28 +1,28 @@
 <?php
-header('Content-Type: application/json');
+header("Content-Type: application/json");
+
+include "./../lib/send_reply_json.php";
+include "./../setup/connect_db.php";
 
 $maestroName = $_POST["maestro_name"];
 
-include "./../setup/connect_db.php";
-
-
-$replyJSON = null;
-
 
+$maestroList = null;
 if(strlen($maestroName) === 0)
-	$replyJSON = get_maestro_list();
+	$maestroList = get_maestro_list();
 else
-	$replyJSON = get_maestro_list_by_name($maestroName);
+	$maestroList = get_maestro_list_by_name($maestroName);
 
-if(strlen($replyJSON) === 0) {
-	send_error_message($replyJSON, "오늘의 랭킹 기록 없음");
-	$db_conn->close();
+if(strlen($maestroList) === 0) {
+	set_error_message("오늘의 랭킹 기록 없음");
+	send_result_fail();
 	exit;
 }
 
-$replyJSON["RESULT"] = "ok";
-echo json_encode($replyJSON, JSON_UNESCAPED_UNICODE);
-$db_conn->close();
+set_data("maestroList", $maestroList);
+send_result_success();
+exit;
+
 
 
 function get_maestro_list() {
@@ -34,21 +34,20 @@ function get_maestro_list() {
 		ORDER BY MaestroID DESC
 	";
 	$stmt = $db_conn->prepare($query);
-	// $stmt->bind_param('iii', $maestroID, $startNo, $endNo);
-	// $stmt->bind_param('ii', $maestroName, $startNo);
+	// $stmt->bind_param("iii", $maestroID, $startNo, $endNo);
+	// $stmt->bind_param("ii", $maestroName, $startNo);
 	$stmt->execute();
 	$stmt->bind_result($maestroID, $name, $accountType);
 
 	$maestroList = array();
 	while($stmt->fetch()) {
-	    $maestro['MaestroID'] = $maestroID;
-	    $maestro['Name'] = $name;
-	    $maestro['AccountType'] = $accountType;
+	    $maestro["maestroID"] = $maestroID;
+	    $maestro["maestroName"] = $name;
+	    $maestro["accountType"] = $accountType;
 	    array_push($maestroList, $maestro);
 	}
 
-	$return_array['MaestroList'] = $maestroList;
-	return $return_array;
+	return $maestroList;
 }
 
 function get_maestro_list_by_name($maestroName) {
@@ -60,21 +59,20 @@ function get_maestro_list_by_name($maestroName) {
 		ORDER BY MaestroID DESC
 	";
 	$stmt = $db_conn->prepare($query);
-	// $stmt->bind_param('iii', $maestroID, $startNo, $endNo);
-	$stmt->bind_param('s', $maestroName);
+	// $stmt->bind_param("iii", $maestroID, $startNo, $endNo);
+	$stmt->bind_param("s", $maestroName);
 	$stmt->execute();
 	$stmt->bind_result($maestroID, $name, $accountType);
 
 	$maestroList = array();
 	while($stmt->fetch()) {
-	    $maestro['MaestroID'] = $maestroID;
-	    $maestro['Name'] = $name;
-	    $maestro['AccountType'] = $accountType;
+	    $maestro["maestroID"] = $maestroID;
+	    $maestro["maestroName"] = $name;
+	    $maestro["accountType"] = $accountType;
 	    array_push($maestroList, $maestro);
 	}
 
-	$return_array['MaestroList'] = $maestroList;
-	return $return_array;
+	return $maestroList;
 }
 
 ?>
\ No newline at end of file
diff --git a/src/web/server/maestro/login.php b/src/web/server/maestro/login.php
index 786f919..18113bd 100644
--- a/src/web/server/maestro/login.php
+++ b/src/web/server/maestro/login.php
@@ -1,5 +1,5 @@
 <?php
-header('Content-Type: application/json');
+header("Content-Type: application/json");
 
 include "./../lib/send_reply_json.php";
 include "./../setup/connect_db.php";
@@ -8,10 +8,10 @@ $maestro_name = $_POST["maestro_name"];
 $password = $_POST["password"];
 /*
 if(!is_numeric($enterCode)) {
-    send_error_code('생년월일이 숫자가 아닙니다. : '.$enterCode);
+    send_error_code("생년월일이 숫자가 아닙니다. : ".$enterCode);
     exit;
 } else if(strlen($enterCode) != 6) {
-    send_error_code('6자리 숫자값을 정확히 입력하세요 : YYMMDD (예 : 120131) : '.$enterCode);
+    send_error_code("6자리 숫자값을 정확히 입력하세요 : YYMMDD (예 : 120131) : ".$enterCode);
     exit;
 }
 */
@@ -30,7 +30,7 @@ if($login_data === null || $login_data[maestroID] === null) {
 	exit;
 }
 
-set_data("maestroId", $login_data[maestroID]);
+set_data("maestroID", $login_data[maestroID]);
 send_result_success();
 exit;
 
@@ -41,7 +41,7 @@ function get_maestro_id($maestro_name) {
 
 	$query = "SELECT MaestroID FROM moty_maestro WHERE Name=?";
 	$stmt = $db_conn->prepare($query);
-	$stmt->bind_param('s', $maestro_name);
+	$stmt->bind_param("s", $maestro_name);
 	$stmt->execute();
 	$stmt->bind_result($maestro_id);
 	// while($stmt->fetch()) {
@@ -58,7 +58,7 @@ function login($maestro_name, $password) {
 
 	$query = "SELECT MaestroID FROM moty_maestro WHERE Name=? AND Password=PASSWORD(?)";
 	$stmt = $db_conn->prepare($query);
-	$stmt->bind_param('ss', $maestro_name, $password);
+	$stmt->bind_param("ss", $maestro_name, $password);
 	$stmt->execute();
 	$stmt->bind_result($maestro_id);
 	// while($stmt->fetch())