Hydrological station is a site to collect basic water information, the basis for hydrological work. With basin's rapid economic growth and population growth, conflict between water supply and demand is more and more prominent.  Real-time hydrological data, collected by hydrological station, is in great demand. The use of digital video surveillance system, to collect data, image, sound, video, improves accuracy. Hydrological stations spread widely and remotely. Thus, it’s impossible to use of wired or fiber communication to delivery data. In contrast, wireless communication wiring is simple, convenient, and the cost is relatively low, saving a lot of investment. Dial-Link Router series is a smart choice for hydrological application.