Military welfare policies serve as an expression of the strong will of national protection at the national level by providing sufficient welfare to military personnel, and as a mechanism for introducing pride and excellent resources for military service. Accordingly, it calls for the development of individual soldiers' self-realization and welfare, as well as the advancement of the barracks environment. The purpose of this study is to suggest the development direction of defense innovation 4.0 and welfare policies in response to the defense manpower crisis, and the research results are as follows. These include ensuring housing conditions in line with the social environment, improving the remuneration system that is appropriate for sacrifice and service, guaranteeing the livelihood of military families that guarantee pride and happiness, building advanced welfare facilities and infrastructure, and ensuring the stable social settlement of veterans. In particular, policies should be prepared to identify issues that can allow the MZ generation to enter the military organization and to ensure a stable social settlement after discharge.