In order to make efficient and reliable test to a certain type of air data computer,an automatic test system was designed based on bus structure.With the measurement and control computer as the core,the test system adopts ATE structure on system framework,the IEEE488,VXI bus control mode and virtual instrument technology to implement automatic test on such performance parameters as air pressure data and atmospheric temperature of a certain type of air data computer.The test system has been put into practical application.The application result shows that:the system is reliable,accurate,and easy to operate,and can satisfy the maintenance and testing requirements of this type of air data computer.