Abstract:The new national system represents a significant institutional innovation in the new era, aimed at achieving major breakthroughs in national defense science and technology. This paper systematically analyzes the inherent differences between national defense technology research and general technological innovation from five dimensions: national defense targeting, resource allocation prioritization, competitive confrontation, development confidentiality, and non-market operational characteristics. It proposes the theoretical connotations and core characteristics of the new national system for national defense technology research. By examining typical cases such as the U.S. Manhattan Project, Japan"s VLSI Plan, and China"s 863 Program, the paper summarizes five key insights: establishing specialized institutions, adhering to independent innovation, leveraging the role of scientists, emphasizing management efficiency, and promoting technology transfer. Based on practical national defense needs, the paper identifies four applicable scenarios-major core key technologies, major strategic frontier technologies, major foundational support technologies, and major bottleneck technologies-and analyzes the institutional compatibility requirements of the new national system.