This paper approaches the changes and development of Correctional Service in Korea in the perspective of public administration and the discussion of establishing Central Correctional Agency. The demand for Correctional Service has increased significantly but Cental Correctional Organization merely adopted a stopgap measure of establishing four regional corrections headquarters. Thus the current system of Correctional Service can only simply look over the status quo and not able to initiate and carry out projects to improve Correctional policy. The paradigm is passive, defensive, and closed, and Correctional Service will be seen as nothing more than a mere policy implementation branch. To solve this problem, this paper proposes newly establishing Central Correctional Agency. It was deemed necessary with the change in the demand, and the comparison with other Korea independent agencies in management and with Correctional Service System in other countries showed serious lack of independence. Also the reestablishment of Central Correctional Agency will have to be carried out considering the unification of Corrections-Protection System.