Network video server is new favorable stuff combining with traditional cameras and network techni, based on the technology of the digital picture, encryption compression, real-time control and network communication transmission and so on., it changes analog video signals into digital signals, after compression and encryption then adopts TCP/IP protocol to send to end-user via build-in video server by LAN or INTERNET. The user use the standard NET browser on his own PC then can remote surveillance according to the IP address, view real-time picture and control camera lens and PTZ, real time surveil the target in the round. Our network video serer adopts advanced MPEG4 hardware compression technic, can transmit real-time high quality picture over 30fps via LAN/WAN. And also blends the advanced Multicast for the video field, which not only meets the demand of multi-user surveillance, but also saves a lot the space for the network resource occupation. The network video server is made based on adopting the opened standard TCP/IP protocol, build-in WEB server, and support IE function. Can remote setup, control and update via COM connecting the internet. It is very convenient to manage and maintain this device!