In environmental governance, as the old concept may be attached to negative affective factors too much, thereby increasing the resistance and the cost of environmental governance, one of the effective methods to promote environmental governance is to introduce new concepts. There is a successful case in this area, which is the concept of "Wetland" introduced. The new concept of wetland achieves ideal effect of environmental governance. On the same time, there are many problems because of introducing of new concept of "wetland". This is the value of studying why the new concept of "wetland" instead of "swamp" and "tidal flat" old concepts, which will help us to understand environmental governance.