With the development of information society, the demand for locationbased services becomes outstanding. With the analysis and comparison of different indoor and outdoor positioning technology, a system combining locationbased Beidou, communication and timing of the three functions and RFID indoor positioning technology is designed. The system is the integrated use of the Beidou satellite system, sensor technology, wireless communication technology, data mining and processing technology. The system uses a joint approach of the Beidou satellite systems and RFID technology to obtain location information and time information. The system mainly consists of two parts, the systemside service platform and the implementation of positioning and multimode communication client. The System uses the client to collect position, time information and their own identifier information, and processes the information by the platformside as needed. The system can provide a unified space and time information service for the public with a precise location information service, time information services and high communication reliability.