At present,the study on constructing the ecosystem carbon process models of coastal wetland has made some progress,but it is still in trial stage that how to couple the ecological process model and remote sensing inversion to estimate spatiotemporal pattern dynamic of wetlands carbon source / sink. We complete the development of coastal wetland carbon source / sink simulation system software by constructing wetland ecosystem carbon process model and remote-sensing inversion model as well as the secondary development of database technology and geographical information system (GIS) software. On this basis,we take the regional remote sensing satellite photographs,the wild wetlands monitoring data and the meteorological observing data as key driving variables,and simulate the carbon budget spatiotemporal pattern dynamic of intertidal bulrush community and dry reed community in Chongming eastern tidal flat. The software system can help managers to estimate spatiotemporal dynamic of carbon source / sink on coastal wetland in regional scale and predict the developing trends of the carbon sink potentials of such kind of wetland under the influences of human activities and climate changes,which provides certain theoretical and technical supports for managers.