The technology is very mature traditional analog surveillance systems, networking and commissioning of the network camera for the engineering staff is already familiar with the analog system, it is relatively unfamiliar, or a little more difficult. We all know, the network camera is relying on the network, the status of the network itself and the application of the network camera effect is closely related to the network infrastructure to meet the monitoring requirements need to be considered. Large investment in new network-based network monitoring system, will have to face to build a new network environment, the investment may cause users to unbearable. In addition, the network camera's visit by the domain name, IP address, and other troubled and network security is the user's focus, so the joint effect of many problems, have restricted the wide range of applications of network cameras in China.