Abstract: The traditional side slope monitoring technology has a series of disadvantages, such as low degree of automation, slowly report of warning situation and long response time. In order to overcome the shortcomings of traditional technology, an intelligent early warning system for slope monitoring based on BDS is proposed. The system is equipped with high-precision receivers, whose plane and elevation monitoring measurement can be millimeter level. In the disaster judgent, the system combines the traditional point stability analysis method and the current relatively new image movement discrimination technology, which further reduces the false alarm rate of disaster. The system is highly integrated, automatic and intelligent with vast functions such as data processing, data storage, data analysis, information management, disaster warning and crossplatform information distribution. It has been proved that the system could run properly and reduce the burden of the manager after a period of time of practice, which implies the system has certain popularization value.