IntroductionThe nuclear issue in North Korea has been a widely discussed issue around the world in recent years, while overall progress since the start of the nuclear crisis (North Korea's withdrawal from the Nuclear Non-Proliferation Treaty in 2003) to cooperation (six-party talks) and its failure is quite dramatic and worth exploring (Fang, 2009). This article attempts to use two perspectives, namely neorealism and neoliberalism, to examine the issue and examine their explanatory power. Accordingly, this article recognizes the importance of both perspectives in explaining the issue. On the one hand, neorealism has shown. the behaviors of restraint and balance of States during the negotiation process, implying the failure of the talks On the other hand, neoliberalism has contributed to clarifying the complexity constituted by the different actors and problems in the matter, while at the same time. demonstrating the rationality of States, as well as the birth of the institution forming international norms. Therefore, the author believes that the two perspectives are not contradictory, but complementary.Framework of AnalysisNeorealism-Structural RealismWhat neorealism considers fear and distrust arise from the anarchy of the international system, resulting in the pursuit of power to survive. As Mearsheimer (2010) puts it, power is the currency of international politics. The statement answered a simple but important question: “Why do states want power?” » While "human nature" is still claimed by classical realism, neorealists, or structural realists like Mearsheimer, have clarified the structure or architecture of the international system that requires states to seek power. All states want to have enough power to protect the medium of paper. In this case, neoliberalism not only helps states make a more rational decision, but also gives rise to the institution that will constitute the norms for states to resolve crises in the future. In conclusion, both are important, even if they are not contradictory, but complementary. Reference Baldwin, DA (1993). Neorealism and neoliberalism. New York: Columbia University PressKeohane, RO & Nye, J.S. (2000). Power and interdependence. Reading, MA: Addison-Wesley. Mearsheimer JJ (2010). Structural realism. International Relations Theories, Discipline and Diversity (Second Edition), p.77-94方玥雯[Fang Yue Wen] (2009). Years 2002-2007. [North Korea's Nuclear Weapons and Security in Northeast Asia: 2002-2007] in 台灣[Taiwan]: 國立政治大學[Cheungchi National University] Retrieved July 18, 2013 from http://nccuir.lib .nccu.edu.tw /handle/140.119/37029