National defense science and technology (hereinafter referred to as national defense science and technology) is the general name of science, technology and engineering directly applied to national defense purposes, an important part of national science and technology, and the key to national defense modernization. The task of the copy is to organize and implement the research and development of various weapons and military equipment, equip various national defense departments with modern weapons technology, and focus on equipping the standing army. All countries in the world apply scientific and technological achievements to the military field first, so national defense science and technology has the characteristics of technology-intensive and rapid renewal. National defense demand and the development trend of world science and technology determine the development direction of national defense science and technology. The development level of national economy provides a material premise for national defense science and technology, which plays an extremely important role in driving and promoting the development of national economy.
National defense science and technology is the general name of natural science and various technologies and processes serving national defense. It mainly includes the basic theory of national defense science and technology, weapons and equipment development, experimental production, use and maintenance technology, national defense engineering technology, military system engineering and so on. National defense science and technology has gradually developed into a relatively independent and complete system with relatively complete systems and scientific research institutions. According to the application fields, there are weapons technology, aviation technology, aerospace technology, ship technology, nuclear technology, electronic technology and military engineering technology. From a global perspective, the focus of national defense science and technology development has shifted to high technology.