The ocean, which covers 71% of the earth's surface, is a basic component of the global bio-support system. It is a treasure house of resources and a regulator of the environment. It is inevitable that the development of humane society come to rely on the ocean. In the 21st century that followed, people will have new opportunities to explore and utilize the ocean. Upholding the principle of marine laws as defined by Convention on Marine Laws by the United Nations, maintaining the wholesomeness of the ocean and guaranteeing the sustainable utilization of marine resources and maritime security have become common missions for all people to abide by and undertake. As a major developing country with a long coastline, China attaches great importance to marine development and protection, and takes it as the state's development strategy. It is constantly strengthening comprehensive marine management, steadily improving its marine-related laws, and actively developing science, technology and education pertaining to the oceans. China made positive contributions to global marine exploration and protection by actively participating in marine affairs of the United Nations, promoting the cooperation between countries and regions and conscientiously performing its obligation in this field.