This paper explores Republic of Korea (ROK)s energy security priorities and problems. During the President Parks administration, ROK has faced wide range of energy security problems. Almost nations energy diplomacy has virtually stopped to function for mostly domestic political reasons. Furthermore, nations energy security has been endangered because ROKs energy security policy has poorly implemented with no concrete goals and no rational choice of energy mix plan. This study seeks to examine ROKs most urgent energy security agenda at the moment and how the country should response to these specific issues. Moreover, this study will investigate ROKs energy mix policy in detail according to various energy resources. This paper contends that t...