Since the 1990s, there has been an upsurge in the research and development of supersonic airliners that have continued to date in the world. At present, the United States, European, Russia and Japan have put forward their own research and development plans for supersonic civil airliners, and have made progress in different degrees. As one of the key systems in airliners, the system architecture and key technologies of avionics system become hotspots. This paper analyzes the structure and advantages and disadvantages of the classical supersonic airliners Concorde and TU-144 avionics association from the perspective of the avionics system of the foreign supersonic aircraft, summarizes the design experience of Avionics System, and predicts the future development trend of supersonic airliners aviation technology.