This study attempts to find ways to develop more effective correctional management in Korea, by comparing crime situation, prison conditions, and the structure of correctional agencies among four different countries, the U.S., China, Japan and Germany. Based on the notion that the primary goal of the correctional institution is to prevent criminals from committing further crimes, the foremost important job of the correctional management lies in developing more efficient operation of in-prison treatment programs. According to this understanding, this article examines the aspects of correctional education, work programs within facilities and the reward-punishment system, healthcare, devices for protecting inmates' human rights in Korea and compares them with those of four other counties. And then the study derives some weak points that the Korean correctional organizations faces and suggests how to improve the current situation.