diff --git a/lib/api/helper.dart b/lib/api/helper.dart
index 9c46d4e3..ae935856 100644
--- a/lib/api/helper.dart
+++ b/lib/api/helper.dart
@@ -21,6 +21,7 @@ import 'package:nkust_ap/api/ap_helper.dart';
 import 'package:nkust_ap/api/bus_helper.dart';
 import 'package:nkust_ap/api/leave_helper.dart';
 import 'package:nkust_ap/api/nkust_helper.dart';
+import 'package:nkust_ap/api/inkust_helper.dart';
 import 'package:nkust_ap/config/constants.dart';
 import 'package:nkust_ap/models/booking_bus_data.dart';
 import 'package:nkust_ap/models/bus_violation_records_data.dart';
@@ -352,7 +353,7 @@ class Helper {
   }) async {
     if (isExpire()) await login(username: username, password: password);
     try {
-      var data = await WebApHelper.instance.coursetable(
+      var data = await InkustHelper.instance.courseTable(
         semester.year,
         semester.value,
       );
diff --git a/lib/api/inkust_helper.dart b/lib/api/inkust_helper.dart
new file mode 100644
index 00000000..6cf98e11
--- /dev/null
+++ b/lib/api/inkust_helper.dart
@@ -0,0 +1,114 @@
+//dio
+import 'package:ap_common/models/course_data.dart';
+import 'package:dio/adapter.dart';
+import 'package:dio/dio.dart';
+import 'package:dio_http_cache/dio_http_cache.dart';
+import 'package:cookie_jar/cookie_jar.dart';
+
+//overwrite origin Cookie Manager.
+import 'package:nkust_ap/api/private_cookie_manager.dart';
+import "dart:math";
+import 'helper.dart';
+import 'package:nkust_ap/api/parser/inkust_parser.dart';
+
+class InkustHelper {
+  static Dio dio;
+  static DioCacheManager _manager;
+  static InkustHelper _instance;
+  static CookieJar cookieJar;
+
+  static int reLoginReTryCountsLimit = 3;
+  static int reLoginReTryCounts = 0;
+  static String loginApiKey = "";
+  static String host = "inkusts.nkust.edu.tw";
+  static String get coursetableCacheKey =>
+      "${Helper.username}_coursetableCacheKey";
+
+  static Map<String, String> ueserRequestData = {
+    "apiKey": null,
+    "userId": null,
+  };
+
+  bool isLogin = false;
+
+  static InkustHelper get instance {
+    if (_instance == null) {
+      _instance = InkustHelper();
+      dioInit();
+    }
+    return _instance;
+  }
+
+  void setProxy(String proxyIP) {
+    (dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate =
+        (client) {
+      client.findProxy = (uri) {
+        return "PROXY " + proxyIP;
+      };
+    };
+  }
+
+  static dioInit() {
+    dio = Dio();
+    cookieJar = CookieJar();
+    if (Helper.isSupportCacheData) {
+      _manager = DioCacheManager(CacheConfig(baseUrl: "https://${host}"));
+      dio.interceptors.add(_manager.interceptor);
+    }
+
+    dio.interceptors.add(PrivateCookieManager(cookieJar));
+
+    var headerRandom = ['13_6', '12_4', '14_0', '13_1', '13_5'];
+    final _random = new Random();
+
+    dio.options.headers['user-agent'] =
+        'Mozilla/5.0 (iPhone; CPU iPhone OS ${headerRandom[_random.nextInt(headerRandom.length)]} like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148';
+  }
+
+  Future<Map<String, dynamic>> inkustLogin() async {
+    if (Helper.username == null || Helper.password == null) {
+      throw NullThrownError;
+    }
+    Response res = await dio.post("https://${host}/User/DoLogin2",
+        data: {
+          "apiKey": loginApiKey,
+          "userId": Helper.username,
+          "userPw": Helper.password,
+          "userKeep": 0
+        },
+        options: Options(contentType: Headers.formUrlEncodedContentType));
+
+    if (res.statusCode == 200 && res.data["success"] == true) {
+      isLogin = true;
+      ueserRequestData['apiKey'] = res.data['data']["userKey"];
+      ueserRequestData['userId'] = res.data['data']["userIdEncrypt"];
+    }
+    return res.data;
+  }
+
+  Future<CourseData> courseTable(String years, String semesterValue) async {
+    if (isLogin != true) {
+      await inkustLogin();
+    }
+    Options _options;
+    _options = Options(contentType: Headers.formUrlEncodedContentType);
+    if (Helper.isSupportCacheData) {
+      _options = buildConfigurableCacheOptions(
+          options: _options,
+          maxAge: Duration(hours: 1),
+          primaryKey: "${coursetableCacheKey}_${years}_${semesterValue}");
+    }
+
+    var requestData = new Map<String, String>.from(ueserRequestData);
+    requestData.addAll({
+      'academicYear': years,
+      'academicSms': semesterValue,
+    });
+    Response res = await dio.post("https://${host}/Course/GetStuCourse2",
+        data: requestData, options: _options);
+    if (res.data['success'] == false) {
+      return null;
+    }
+    return CourseData.fromJson(inkustCourseTableParser(res.data));
+  }
+}
diff --git a/lib/api/parser/inkust_parser.dart b/lib/api/parser/inkust_parser.dart
new file mode 100644
index 00000000..2ba46be1
--- /dev/null
+++ b/lib/api/parser/inkust_parser.dart
@@ -0,0 +1,69 @@
+Map<String, dynamic> inkustCourseTableParser(Map<String, dynamic> data) {
+  Map<String, dynamic> result = {
+    "courses": [],
+    "coursetable": {
+      "Monday": [],
+      "Tuesday": [],
+      'Wednesday': [],
+      'Thursday': [],
+      'Friday': [],
+      'Saturday': [],
+      'Sunday': [],
+      'timeCodes': [],
+    },
+  };
+  //reverse data type for more easy to use.
+  Map<String, dynamic> _tempDateTimeChange = {};
+
+  //timeCodes parse
+  data["data"]["time"].forEach((element) {
+    result["coursetable"]["timeCodes"].add("第${element["periodName"]}節");
+    _tempDateTimeChange.addAll({element["period"]: element});
+  });
+
+  //courses parse
+  data["data"]["course"].forEach((element) {
+    result["courses"].add({
+      "code": "",
+      "title": element['courseName'],
+      "className": element['className'],
+      "group": element["courseGroup"],
+      "units": element["courseCredit"],
+      "hours": element["courseHour"],
+      "required": element["courseOption"],
+      "at": element["courseAnnual"],
+      "times": element["courseTime"],
+      "location": {"room": element['courseRoom']},
+      "instructors": [element['courseTeacher']]
+    });
+  });
+
+  Map<String, String> courseWeek = {
+    "1": 'Monday',
+    "2": 'Tuesday',
+    "3": 'Wednesday',
+    "4": 'Thursday',
+    "5": 'Friday',
+    "6": 'Saturday',
+    "0": 'Sunday',
+  };
+  //coursetable parse
+  data["data"]["course"].forEach((courseElement) {
+    courseElement['courseTimeData'].forEach((singleCourseObject) {
+      result['coursetable'][courseWeek[singleCourseObject['courseWeek']]].add({
+        "title": courseElement['courseName'],
+        "date": {
+          "startTime":
+              "${_tempDateTimeChange[singleCourseObject["coursePeriod"]]["begTime"].substring(0, 2)}:${_tempDateTimeChange[singleCourseObject["coursePeriod"]]["begTime"].substring(2, 4)}",
+          "endTime":
+              "${_tempDateTimeChange[singleCourseObject["coursePeriod"]]["endTime"].substring(0, 2)}:${_tempDateTimeChange[singleCourseObject["coursePeriod"]]["endTime"].substring(2, 4)}",
+          "section":
+              "第${_tempDateTimeChange[singleCourseObject["coursePeriod"]]["periodName"]}節"
+        },
+        "location": {"room": courseElement['courseRoom']},
+        "instructors": [courseElement['courseTeacher']]
+      });
+    });
+  });
+  return result;
+}
diff --git a/lib/pages/home_page.dart b/lib/pages/home_page.dart
index d04f7241..b81ba1e2 100644
--- a/lib/pages/home_page.dart
+++ b/lib/pages/home_page.dart
@@ -20,6 +20,7 @@ import 'package:http/http.dart' as http;
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:nkust_ap/api/ap_status_code.dart';
+import 'package:nkust_ap/api/inkust_helper.dart';
 import 'package:nkust_ap/models/login_response.dart';
 import 'package:nkust_ap/models/models.dart';
 import 'package:nkust_ap/pages/announcement/news_admin_page.dart';
@@ -656,6 +657,8 @@ class HomePageState extends State<HomePage> {
     }
   }
 
+  static const PREF_API_KEY = 'inkust_api_key';
+
   void _checkFeatureEnable() async {
     await Future.delayed(Duration(milliseconds: 100));
     try {
@@ -663,6 +666,10 @@ class HomePageState extends State<HomePage> {
       await remoteConfig.fetch(expiration: const Duration(seconds: 10));
       await remoteConfig.activateFetched();
       busEnable = remoteConfig.getBool('bus_enable');
-    } catch (e) {}
+      InkustHelper.loginApiKey = remoteConfig.getString(PREF_API_KEY);
+      Preferences.setString(PREF_API_KEY, InkustHelper.loginApiKey);
+    } catch (e) {
+      InkustHelper.loginApiKey = Preferences.getString(PREF_API_KEY, '');
+    }
   }
 }