Over the past 40 years, with the rapid development of gun digital technology, the gun integrated electronic system has experienced the evolutionary development process of discrete, federal, and combined system architecture. The development of the future generation of gun integrated electronic system architecture is still in the research and exploration stage. The research results are relatively few and lack of systemicity. This paper proposes a development model and basic concepts of a one-net architecture for the integrated electronic system of gun, and discusses the system composition of the one-net architecture and the core key technologies that need to be solved.