The invention relates to a system for using computer to set and manage the network video device and memory device, and using network to transmit video data, and a relative safety detecting method, wherein said system connects the network video device and the network additional memory device, to store the video code stream output by the network video device in the additional memory device; user uses the computer of network to set and manage the video devices and the memory devices, and browse the real-time image of video devices, and replays the stored image on the memory devices. With said invention, user can build the detecting system based on computer network, based on real demand. And the invention can improve the safety, the expanding property and simplify the video data management. |