diff --git a/apps/counter/api/views.py b/apps/counter/api/views.py
index f2ae239..ea8d2b8 100644
--- a/apps/counter/api/views.py
+++ b/apps/counter/api/views.py
@@ -61,7 +61,8 @@ class DeviceLogStatisticAPIView(APIView):
 
     def get(self, request, *args, **kwargs):
         # calc total count, no cache
-        total_count_queryset = [DeviceCount.objects.get(device_id=x['device_id'], data_time=x['max_time'])
+        total_count_queryset = [DeviceCount.objects.filter(device_id=x['device_id'],
+                                                           data_time=x['max_time']).order_by('-count')[0]
                                 for x in DeviceCount.objects.values('device_id').annotate(max_time=Max('data_time'))]
         if total_count_queryset:
             total_count = sum(map(lambda x: int(x.count), total_count_queryset))