International Energy Agency (lEA) has Implementing agreemenl on Ocean Energy Systems (OES
since 2001 and member countries have continuously increased. Many countries have developed "National Strategy for ocean energy development" as the UK, US, Ireland, Korea and China. As a coastal state has a potential of marine energy, Vietnam is importing more fuel energy, so should have a national strategy for ocean energy development. This paper will analyze the policies, strategies and mechanisms for the exploitation and development of marine energy in the world and proposals for future energy sustainable development in Vietnam.