A high efficiency, informatization, automation water-level monitoring system was designed. It was very helpful to improve the level of hydrological forecast and the level of geological disasters forecast.This water-level monitoring system was based on a 32 bits LM3S615 embedded microcontroller as the main control unit. It consisted of four modules: the main control unit(LM3S615),the signal acquisiton and conduction module, the power supply module and the wireless transceiver module. In the system, the redundant power supply circuit was designed to improve the system’s reliability further. After the test, the operation of the system has been able to complete the expected target, and achieve the performance requirement. At the same time, it also has the very good instruction function for the development of related industrial products.