Abstract: As“Shanghai Garden”, Chongming Dongtan wetland has great significance of the economic development and ecological protection of Shanghai. On the basis of a large number of preliminary studies domestic and abroad, the essay used a series of ecological economics evaluation methods such as market value method, expenses method, shadow project method, and Results of reference method to assess the service functions of Chongming Dongtan wetland ecosystem. The results showed that: the total value is 31.68 billion Yuan; the largest proportions are material production values and recreational value, respectively 10.93 billion Yuan and 7.6 billion Yuan, indicating that the mainly services of Chongming Dongtan wetland are supply services and cultural services. Then followed by the value of degradation of pollutants, the value of climate regulation, the value of adjusted flood water storage，the value of biodiversity conservation, the value of species habitat and the value of scientific research and culture. The assessment of the value of Chongming Dongtan wetland ecosystem can provide a reference for the rational development and utilization and ensure the sustainable use of its resources.