This paper attempts to evaluate the effectiveness of U.S. economic sanctions on North-Korea. To review the effectiveness, U.S. economic sanctions on North-Korea are compare the case of Libya. This paper explains U.S. economic sanctions currently in place and summarizes questions. The problems of U.S. economic sanctions on North-Korea are minium of multilateral cooperation, irrationality of object and A means of the greatest expenses. judging from this problems, U.S. economic sanctions on North-Korea have been a petty effectiveness. Like this, Economic policy options include easing economic sanctions, leading to open society and nomalizing relations with North-Korea. The wisest policy is not economic sanctions on North-Korea but minium of conflict through economic incentives.