Modern welfare states are now facing the difficulties that they must make reasonable and systematic use of their national lands and, at the same time, ensure a just compensation on infringement of private property rights by public works. Administrative compensation for expropriation of the private land has been one of critical issues as large amount of land has been required toward public works such as national land development, industrial development, and city redevelopment. As a result, compensation troubles resulting from expropriation of the private land have been increasing due to the current unsatisfactory compensation system, leading to frustration of public works as well as national budget waste. Therefore, this study deals with some problems of an existing law system related to the positive law and also offering a policy direction by the comparative methods and judicial precedents.