Aiming at the testing requirement of an airborne system and the dissatisfactory of the present testing methods and devices in the field of flighttesting. The design method that the test equipment system have opens structure based on CAIS was put forwarded. Problems such as the various kinds of equipments could not compatibility and the difficulty of substitute in the test equipment system are solved. The required test items of the test equipment system based on CAIS are experimented and the self test succeeded. The test equipment system has been put into practice. It is indicates that system could satisfy the self testing, and it has the characteristics of high accuracy, reliable performance and being easily extended.