Abstract: In recent years, sum of results in the development of marine economy and building a powerful marine province were obtained in Hainan province.At the same time, there were many nu-harmonious factors merging in the marine ecological-economic system.Based on the theory of synergism, ecological economy, and the statistical data from 2005 to 2014, the evaluation index system of marine ecological-economic system was built, the marine ecological-economic system development level, coordination degree, and coordination development degree of Hainan province were calculated, analyzed and evaluated, the Marine ecological-economic system coordination development stage of Hainan province was determined.Finally, the suggestions were advanced.Studies have shown that marine ecological-economic system of Hainan province and its each subsystem coordination degree were on high quality coordinated development stage, the coordinated development degree was on the rise wholly, but the overall level of development were still a lot of room to improve.