According to the need of the current rapid development of hydrological monitoring system, this paper puts forward a complete and feasible hydrological monitoring system solution based on Internet of things technology. In this solution, all kinds of new technology are used, including the Zigbee wireless sensor network technology, embedded technology, GPRS mobile communication technology, the Beidou satellite communication technology and B/S structure method and etc. The scheme is stable and reliable in practical all-weather environment, which can acquire data in real-time, and the maximum delay is not more than 13 seconds, so it is an ideal solution.