As the test and maintenance of weather radar is based on abundant technical experiences and knowledge, it needs a great deal of information and specialty. Taking for example of CINRAD SA/SB, the development of test and maintenance for weather radar is introduced, and the 2step experience database, hierarchical database， faults case database, fault tree diagram, and so on for weather radar are described. The compatibility, expansibility, and building target for test and maintenance are pointed out. According to practice, the test and maintenance database is a helpful tool for daily technical support in different level users of CINRAD SA/SB. The test and maintenance of weather radar should be paid enough attention and continually be enriched and perfected.