Security monitoring management system and its working method

The system comprises a main control host machine having information database and control software, a sub-control host machine, a video server, a hard disc recorder, a video distributor, a video switch matrix, a matrix keyboard, a second control matrix, an image splitter, a video-wall, an adapter, a decoder, a pickup camera and a cradle head. Through real-time supervision for scene under supervision, automatic switch, automatic alarm and the linkage of each sub-system in LAN, the police man can monitor all images in the authorized area, and can manually or timing record the images, and can playback the recorded images.