diff --git a/lib/api/parser/ap_parser.dart b/lib/api/parser/ap_parser.dart
index 11f8779c..e5bee4b0 100644
--- a/lib/api/parser/ap_parser.dart
+++ b/lib/api/parser/ap_parser.dart
@@ -428,19 +428,20 @@ Map<String, dynamic> roomCourseTableQueryParser(dynamic html) {
   //the second talbe.
 
   //make timetable
-  var secondTable =
-      document.getElementsByTagName("table")[1].getElementsByTagName("tr");
-  try {
-    //remark:Best split is regex but... Chinese have some difficulty Q_Q
-    for (int i = 1; i < secondTable.length; i++) {
-      var _temptext =
-          secondTable[i].getElementsByTagName('td')[0].text.replaceAll(" ", "");
+  var secondTable = document.getElementsByTagName("table");
+  if (secondTable.length > 0)
+    try {
+      final td = secondTable[1].getElementsByTagName("tr");
+      //remark:Best split is regex but... Chinese have some difficulty Q_Q
+      for (int i = 1; i < td.length; i++) {
+        var _temptext =
+            td[i].getElementsByTagName('td')[0].text.replaceAll(" ", "");
 
-      data['coursetable']['timeCodes'].add(_temptext
-          .substring(0, _temptext.length - 10)
-          .replaceAll(String.fromCharCode(160), ""));
-    }
-  } on Exception catch (e) {}
+        data['coursetable']['timeCodes'].add(_temptext
+            .substring(0, _temptext.length - 10)
+            .replaceAll(String.fromCharCode(160), ""));
+      }
+    } on Exception catch (e) {}
   //make each day.
   List keyName = [
     'Monday',
diff --git a/lib/pages/study/room_course_page.dart b/lib/pages/study/room_course_page.dart
index d242775c..ed20c2b8 100644
--- a/lib/pages/study/room_course_page.dart
+++ b/lib/pages/study/room_course_page.dart
@@ -80,7 +80,10 @@ class _EmptyRoomPageState extends State<EmptyRoomPage> {
         onSuccess: (CourseData data) {
           courseData = data;
           setState(() {
-            state = CourseState.finish;
+            if (courseData.courses.length != 0)
+              state = CourseState.finish;
+            else
+              state = CourseState.empty;
           });
         },
         onFailure: (DioError e) async {