The purpose of this paper is to present a model of local government composition suitable for our situation for the development of local autonomy and the efficiency of local autonomy through legal and institutional approaches in the form of local governments in Korea. In the meantime, Korea has implemented a system that is uniform in the form of local governments, regardless of population or class structure, close to institutional confrontation and parliamentary type. This system aims to ensure that the executive and voting agencies are separated and that checks and balances are made between local government agencies. However, the implementation of a uniform system nationwide without considering the self-righteousness of the head of the group and the population or financial status could not result in inefficiency of administration and local autonomy. Today's local administration needs to be more proactive in responding to changes in the environment. Society is diversifying and the environment of politics, economy, and society is rapidly changing, and population reduction and aging, housing, transportation, welfare, autonomous police, and environmental issues are becoming big issues. To solve these problems, diversification of the organisation of local governments is necessary. From this perspective, this paper aims to examine the need for diversification of local government forms, the theoretical examination of local government composition in Korea, and to present a form of local government suitable for our situation by learning foreign local government forms.