In 2005, Korea launched several carbon management R&D projects as one of the governmental global climate change policies, specifically about the CO2 storage in geologic and oceanic reservoirs. CO2 ocean sequestrations have been developed as an effective method to sequester amount capacity of CO2, because the capacity of terrestrial sequestration sites on land is very limited in Korea. However, cost-ineffectiveness has been indicated as one of the key barriers. In this paper, the preliminary evaluation of the technical and economic feasibility by the \\\\'Moving Ship\\\\' method in Korea is carried out and its prospects are outlined. Also, we try to discuss the issues of elemental technologies and emphasize the necessity of continuing R&D efforts for the effective system development of CO2 ocean sequestration.