diff --git a/src/game/lib/db_service.js b/src/game/lib/db_service.js
new file mode 100644
index 0000000..bf941ca
--- /dev/null
+++ b/src/game/lib/db_service.js
@@ -0,0 +1,74 @@
+function DBService() {
+	this.path = this.getPath();
+	this.directoryName = this.getDirectoryName(this.path);
+	this.webPath = this.getWebPath(this.directoryName);
+
+	this.maestroID = 0;
+	this.playerID = 0;
+	this.appName = "";
+	this.dateAndTime = null;
+}
+
+DBService.prototype.getPath = function() {
+	return window.location.pathname;
+}
+
+DBService.prototype.getDirectoryName = function(path) {
+	var pathAndFileNames = path.split("/");
+	return pathAndFileNames[pathAndFileNames.length - 2];
+}
+
+DBService.prototype.getWebPath = function(directoryName) {
+	if(directoryName === "test")	// mouse_typing/test/
+		return "../src/web/";
+	else	// mousetyping/src/web/client/
+		return "../";
+}
+
+
+DBService.prototype.setMaestroID = function(maestroID) {
+	this.maestroID = maestroID;
+}
+
+DBService.prototype.setPlayerID = function(playerID) {
+	this.playerID = playerID;
+}
+
+DBService.prototype.setAppName = function(appName) {
+	this.appName = appName;
+}
+
+DBService.prototype.setDateTime = function(date, time) {
+	this.dateAndTime = date + time;
+}
+
+DBService.prototype.resetDateTime = function() {
+	this.dateAndTime = null;
+}
+
+
+
+DBService.prototype.makeXhr = function(filepath, onreadystatechange) {
+	var xhr = new XMLHttpRequest();
+	xhr.open("POST", this.webPath + filepath, true);
+	xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
+	xhr.onreadystatechange = onreadystatechange;
+	return xhr;
+}
+
+DBService.prototype.requestWritingPlayerList = function(onSucceededListener, onFailedListener) {
+	var xhr = this.makeXhr(
+		"php/writing/player_list.php",
+		(function() {	// onreadystatechange
+			if(xhr.readyState == 4 && xhr.status == 200) {
+				var replyJSON = JSON.parse(xhr.responseText);
+
+				if(replyJSON != null)
+					onSucceededListener(replyJSON);
+				else
+					onFailedListener(replyJSON);
+			}
+		}).bind(this)
+	);
+	xhr.send("maestroID=" + this.maestroID + "&playerID=" + this.playerID);
+}
\ No newline at end of file
diff --git a/src/web/php/db/db_method_collection.php b/src/web/php/db/db_method_container.php
similarity index 83%
rename from src/web/php/db/db_method_collection.php
rename to src/web/php/db/db_method_container.php
index 0bd05e7..0d6ff9f 100644
--- a/src/web/php/db/db_method_collection.php
+++ b/src/web/php/db/db_method_container.php
@@ -1,5 +1,5 @@
 <?php
-class DBMethodCollection
+class DBMethodContainer
 {
 	protected $mysqli;
 
diff --git a/src/web/php/db/writing_collection.php b/src/web/php/db/writing_collection.php
index 997b08d..422c8ad 100644
--- a/src/web/php/db/writing_collection.php
+++ b/src/web/php/db/writing_collection.php
@@ -1,5 +1,5 @@
 <?php
-class WritingCollection extends DBMethodCollection
+class WritingCollection extends DBMethodContainer
 {
 
 	public function getSystemWritingList()
diff --git a/src/web/php/writing/player_list.php b/src/web/php/writing/player_list.php
index a5da2ac..d157e69 100644
--- a/src/web/php/writing/player_list.php
+++ b/src/web/php/writing/player_list.php
@@ -20,7 +20,7 @@ if (!$isConnected) {
 }
 
 
-include "./../db/db_method_collection.php";
+include "./../db/db_method_container.php";
 include "./../db/writing_collection.php";
 
 $writingCollection = new WritingCollection($dbConnector->getMysqli());
diff --git a/test/tdd.html b/test/tdd.html
index 9a0d8d4..83fdfe5 100644
--- a/test/tdd.html
+++ b/test/tdd.html
@@ -35,6 +35,7 @@
 	<script src="../src/game/typing/lib/keyboard.js"></script>
 	<script src="../src/game/lib/history_record_manager.js"></script>
 	<script src="../src/game/lib/heart_manager.js"></script>
+	<script src="../src/game/lib/db_service.js"></script>
 	<script src="../src/game/lib/db_connect_manager.js"></script>
 	<script src="tdd.js"></script>
 </body>
diff --git a/test/tdd.js b/test/tdd.js
index 4f007cd..7e1225a 100644
--- a/test/tdd.js
+++ b/test/tdd.js
@@ -2,21 +2,27 @@
 // DBConnector
 
 QUnit.test( "DBConnector", function( assert ) {
-	var maestroID = "choco";
-	var playerID = "jisangs";
+	var dbService = new DBService();
+	dbService.setMaestroID(3);	// 삼화초
+	dbService.setPlayerID(35);	// 박지상
 
-	var xhr = new XMLHttpRequest();
-	xhr.open("POST", "./../src/web/php/writing/player_list.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);
-			console.log(replyJSON);
-		}
-	};
-	xhr.send("maestroID=" + maestroID + "&playerID=" + playerID);
+	var done = assert.async();
+	setTimeout(function() {
+		dbService.requestWritingPlayerList(
+			(jsonData) => {		// onSucceeded
+				console.log(jsonData);
 
-	assert.equal(1, 0, "DBConnector");
+				var writingArray = jsonData["writingArray"];
+				assert.equal(writingArray[0].name, "봄 - 윤동주", "name");
+				assert.equal(writingArray[3].name, "허생전 - 박지원", "name");
+				done();
+			},
+			(jsonData) => {		// onFailed
+				// console.log(jsonData);
+				done();
+			}
+		);
+	});
 });