The first reaction to the disintegration of the USSR by the end of 1991 was fear of an outburst of ethnic and interstate conflicts in the post-Soviet territory. in the Transcaucasus a war had broken out between Armenia and Azerbaijan; Moldova had split into two parts-Pridnestrovye and the territory loyal to Kishinyov; Ukraine faced the hazard of the Crimean Peninsula being annexed by Russia; and in the Baltic states a conflict flared up between authorities and Russian-speaking populations concerning the issues of citizenship and the state language. In those circumstances it was crucial to have a mechanism for dialogue and cooperation. Thus, in early 1992, a Commonwealth of Independent States [CIS] was created. But from the start CIS couldn't play a role to solve political and economic problems that happened in the region of Central Asia. So, the Central Asian Union [CAU] was created in 1994 because of the disappointment with the CIS, originally comprised of three states-Kazakhstan, Kyrgyzstan, and Uzbekistan. The creation of CAU caused a certain euphoria about the prospects of regional integration, and a number of regional cooperation institutions and mechanisms were established, such as interstate presidential and prime minister-level committees, and the Central Asian Bank for Cooperation and Development. Also, at that time, relationships among the presidents could be termed friendly. But after cease-fire of Tajik Civil War Tajikistan and Uzbekistan has been unfriendly and after Kazakhstan is emerging as a new economic power in the region Uzbekistan and Kazakhstan has been unfriendly too. Consequently, at present, CAU could be considered a failure in most of its functions. Now we have to understand the conflict structure of the region in Central Asia and consider solutions to establish CAU realistically. US, China, and Russia as high-level states can't paly a role to solve the regional problems in Central Asia and recreate CAU because of representative partnership with Central Asian States. In this point we must cognize Middle Power as communicator to solve the upper problems in Central Asia. For examples, Kazakhstan can't solve the conflict with Uzbekistan by bilateral relations and high-level states hasn't exerted great efforts to improve the relationship between two states. Middle Power can play a role to solve the regional problems and discuss with high-level states. Now we consider Korea as Middle Power in Central Asia. Korean government has pushed New Asia Initiative and Central Asia is suitable region to achieve it. This paper will analyze the possibility of the establishment of multinational cooperation organization to solve the regional problems in Central Asia through the case of Tajik Civil War and the role of Korea as Middle Power.