In recent years, with the maturity of artificial intelligence, information network and other technologies, avionics system has developed rapidly, and discussions about how to apply avionics system to combat in the future have emerged in an endless stream.By integrating various innovative activities of avionics system with three-level analysis method, a reasonable and sustainable methodology for the future is constructed to study the field of avionics system.Firstly, the background and present situation of avionics systems is systematically reserarched, and then the three-level analysis method model is deeply analyzed, the application of avionics system is analyzed in detail from three aspects, the reduction of the efficiency of manned avionics system and its reasons, the continuous improvement of the current avionics system and the induction of two types of innovations, and a highly autonomous unmanned avionics-led vision in the future and its three driving factors.