Network video recording and playback system and method

The invention relates to a network video recording and playback system and method. The system comprises a video data acquisition module, a local terminal recording module and a remote terminal video playback module, wherein the video data acquisition module acquires video streaming data and business data, compresses and encodes the video streaming data, sends compressed and encoded video streaming data to the local terminal recording module and establishes an associative index for the video streaming data and an address; the local terminal recording module stores the compressed and encoded video streaming data, optimizes video storage, establishes an index for the video streaming data, receives a video playback request signal, finds out the corresponding video streaming data according to the index and sends the video streaming data to the remote terminal video playback module; the remote terminal video playback module sends a video playback request signal to the local terminal recording module, receives the video streaming data and plays videos. Compared with the prior art, the network video recording and playback system and method are applicable to low-bandwidth communication links, few in video storage file fragment, high in disk utilization rate and accurate and efficient in video playback positioning.