Abstract:Three ground based microwave radiometers were introduced into the artificial rainfall project for Sanjiangyuan Nature Reserve in 2008. Network data processing system for ground based microwave radiometers was designed for the sake of acquiring the atmospheric information rapidly, visually and accurately, which was observed in the whole reserve. According to the function, the system can be divided into four parts: data uploading program, databases designing, data writing into database program and user terminal program for display. Structured programming was used for the system development. Delphi was used as the programming language, and Microsoft SQL Server 2000 as the database was selected to realize the functions of real time temporary database and historical database establishing, microwave radiometer data conversion to the standard format, transformation, appending, data query, data exportation, and data display. After more than six months of software testing, the system is operating well overall, and is about to apply in the meteorological observation.