The purpose of this research is to interpret the Korean history in terms of the ocean historical view. In particular, it gives a concept of the development process of ancient history under a view named East Asian-Mediterranean-Sea model. In Korean history, Ocean plays critical role to make political, cultural, and economical exchange. Therefore, we need to employ two perspectives that implicate the land and the ocean together based on the geographical conditions such as peninsula, sea and land simultaneously to understand the Korean history appropriately. Accordingly, it is necessary to make a study on ocean history. In order to understand the history concretely and efficiently, and make implication from the historical understanding, we can review the point through constructing the East Asian-Mediterranean-Sea model, based on ocean historical view. With the standpoint on Korean peninsular, East Asian Sea territory is consisted of the eastern sea, tartarian straits, and southern sea, which are located between Korean peninsular and Japanese island. Also, there is an inland sea named yellow sea between China and Korean peninsular. The southern Korean peninsular, Western Japanese Island, and Southern Chinese land, located below Yangtze river, are linked together through a intermediary, named Eastern Chinese sea. Therefore, the East Asia sea territory resemble the Mediterranean Sea in its shape relatively, not perfectly though. With the consideration of various natural environment and oceanic conditions, The East Asian-Mediterranean-Sea is likely to contain similar historical space each other. Most of East Asian tribes crowd round this area, and these people interchange through the sea. Under the cultural diversity in this area, stability culture became to meet the mobility culture. The ocean is located in the core of East Asia, and it has significant meaning and function. Maritime activities were vivacious from Ancient Cho-Sun and Sam-Han era. Go-Cu-Ryo dynasty became a powerful country through both management of the land and expansion of the sea in its peak. It extinguished, however, by the amphibious invasion from the alliance composed of Shin-La dynasty and Dang dynasty of China. Baek-Je dynasty began its maritime activity from its early stage. There are signs that it negotiated with China actively via Northern China and sea, and it advanced into China directly at its heyday. In addition, Baek-Je went to Japanese Island in earnest through the sea. Ga-Ya dynasty inherited maritime tradition from Kun-Han, Jin-Han, and other dynasty, and develops its oceanic culture and made active trade with Japanese Island. Shin-la dynasty entered into Japan in its beginning, and the oceanic culture progressed when the King Jin-Hung secured Kyoung-Ki gulf. After then, Shin-la also used sea to negotiate with Dang dynasty confidentially when it made Baek-Je fall. In seventh century, there was the international war that caused reorganization of power among the east asian dynasties in the East Asian mediterranean sea. As a result of the war, Dang dynasty in China, Shin-La, Bal-Hae in Korean peninsula, and Japan were born. In the process of international war among three nations, the maritime power of each nation played the important role. However, the nations in Korean peninsula were forfeited the roles as balancing political and military power in East Asian Mediterranean region as a result of the war. Therefore, the nations in Korean peninsular turned out to be the circumference nations that were affected by China.