Abstract:The GPRS/CDMA wireless communication technology has many advantages, such as forever online, fast login, charge by amount of data, etc. This system is highly reliable, easy to install, and convenient to maintain. The Beijing Meteorological Bureau (BMB) developed a new GPS data transmission system based on GPRS/CDMA wireless communication technology to replace the former one based on modem and PSTN communication technology in October 2004. This new communication system collects data from GPS receivers located in the BMB GPS water vapor sensor network every half an hour automatically and has been put to operational use.