For improving Ningxia meteorological data service, standardizing user interface for CIMISS meteorological database and promoting retrieval efficiency of CIMISS database, this paper designs Ningxia meteorological data query system by VC++ and CIMISS API. The system is accessible to authorized users for data query, graphical displaying and exporting from CIMISS basic data base. In application of the system, the results show the system is very supportive for climate analysis, weather forecasting and meteorological materials research.