Abstract: After describing the meaning, function and existing problems in wetland ecosystem, the current situation of wetland ecosystems (WE) in Hainan, which plays an important role in WE of China, is described. From 1995 to 2003, the area of inland-wetland system, ocean and coastal wetland system has been reduced 20.7% and 41.4% respectively. The area of artificial wetland system has only been increased 1.2%. The worse situation was mainly caused by reclamation and reformed without carefully planning. WE was destroyed by a vicious circle caused by the development of ecological tour, pollution and the destruction of biodiversities. These four reasons were interconnected which made the situation of WE in Hainan worse. Six management suggestions were proposed. They included the change of development conception, more detail investigation on WE, more financial support, strengthening the legislation and its implementation to protect WE, and to recover wetland on the basis of reasonable utilization.