This paper introduces a computer test system of Micro Inertial Measurement Unit(MIMU). The system structure, hardware selection and software design about the test system are described. The key technologies in software design about test with RS232, multi-language programming between VC and Labwindows/CVI, multi-thread, multi-language programming between VC and Matlab are described in detail. The system is common to the MIMU based on high-speed CPU, CPLD and FPGA and can be expanded in researching. With this CADS, the efficiency can be promoted and the period of research and development can be reduced markedly.