Space Test is the basic guarantee for the implementation of space engineering projects, and its reliability and efficiency are directly related to the success of the mission. Firstly, the important function and main challenges of space test are analyzed from the requirement of space test in the whole process of the mission. After that, the current situation of space test both home and abroad are analyzed, based on which the development trend of space test technology is discussed. and some suggestions are put forward in the field of space test.