diff --git a/service/CollectorService.go b/service/CollectorService.go
index f6bfa93..64fd7f5 100644
--- a/service/CollectorService.go
+++ b/service/CollectorService.go
@@ -82,7 +82,7 @@ func (s *CollectorService) RemoveSensorConfigs(sensorConfigs []*ocmsc.SensorConf
 	}
 
 	for _, sensorConfig := range sensorConfigs {
-		s.scheduleMap.Delete(sensorConfig.ConfigID)
+		s.removeSchedule(sensorConfig.ConfigID)
 	}
 
 	return nil
@@ -97,6 +97,15 @@ func (s *CollectorService) addSchedule(interval int64, sensorConfig *ocmsc.Senso
 	s.scheduleMap.Store(sensorConfig.ConfigID, scheduleID)
 }
 
+func (s *CollectorService) removeSchedule(configID string) {
+	scheduleID, ok := s.scheduleMap.Load(configID)
+	if !ok {
+		return
+	}
+	s.scheduleMap.Delete(configID)
+	s.scheduler.Cancel(scheduleID.(string))
+}
+
 func (s *CollectorService) collectTask(sensorConfig *ocmsc.SensorConfig) {
 	logging.Logger().Debugf("CollectorService.collectTask for sensor config id[%s] of crawler[%s]", sensorConfig.ConfigID, sensorConfig.Crawler.Name)