Alarm interlocking method in network video monitoring system and network video monitoring system

The invention discloses an alarm interlocking method in network video monitoring system and network video monitoring system, which belongs to the field of network video monitoring. A plurality of video collecting devices in a network video monitoring system are provided with alarm interlocking strategies; the method includes the steps as follows: the video collecting devices collect video data, and send the collected video data to a video analyzer; the video analyzer analyzes whether the received video data comprises the contents of alarm events or not; if yes, then the video analyzer sends the alarm information to a video monitoring platform; the video monitoring platform triggers the video collecting devices according to the alarm information; and the video collecting devices execute corresponding interlocking actions according to the alarm interlocking strategies, thereby being capable of timely obtaining the alarm information in the video data and improving the efficiency for processing alarm events.