Based on documented data of 2009，field investigation，and experiments，we quantitatively evaluated the values of dominant ecosystem service functions of urban wetlands in Zhenjiang City of Jiangsu Province，comprehensively using approaches of ecological，environmental and resource economics． The results show that the wetlands possessed large and multi-dimensional ecological service functions with the total value of approximately 3． 14 ×1010Yuan， of which the direct and indirect use values were 73． 71% and 26． 29%，respectively． In the three major categories of dominant ecosystem service functions，the values of culture-social service function has the largest function value，as high as 39． 18% of the total value，followed by those of the production service function(32． 34%)，and the regulation and maintenance service function(28． 48%)． Meanwhile，the values of tourism and leisure，flood regulation，water supply and rice production summed as 84． 22% of the total value． The value per unit area of Zhenjiang City urban wetland was about 46 times of the global and national average． Specifically，the unit area value of the natural wetlands was estimated as high as 5． 49 × 105Yuan /hm2，much more than that of the artificial wetland (1． 04 ×105Yuan/hm2)．