The 4th industrial revolution technology is developing into a super convergence technology that is difficult to predict change centering on super intelligence and hyper connectivity. But the pace of scientific and technological development is very far from the mid-to-longterm military deployment of weapons systems. It is becoming a weapon of technology that should be eliminated. In particular, in recent years, the focus of science and technology, DNA (Data, Network, A.I), is getting deeper. This study is the discussion on the development of technology-led weapon systems and the development of weapon systems led by the concept of operation. Weapon systems are national, military oriented products, and the development risk, cost, and period required to provide them to consumers by making them diversified by suppliers (scientists and engineers) are excessive. Leading the technology is the concept of operation, that is, the pilot development of a weapon system with excellent performance with advanced technology even if there is no requirement. If the operator, the military, does not develop an operation concept in parallel, it is difficult to expect operational effects even for high-tech products. In order for advanced technology to be effectively projected onto the battlefield, the military must have technical understanding.