Abstract: Fifteen suspended sediment concentrations(SSC) resulting images are retrieved from Landsat images using Gordon formulation in the Changjiang Estuary in China.Base upon these results, a spatial and temporal analysis has been conducted with the findings as following: the SSC in the Changjiang Estuary decrease significantly by nearly 40% over the past 40 a; their variation curves show high similarity with curve of decrease in riverine sediment supply, which is deduced by a geological environment change and big hydraulic engineering projects, that is to say, to some extent, the SSC maps retrieved from remote sensing images can suggest the geological environment change in the long time scale, as well as the dramatical variation caused by human being engineering activities in short time scale.Although the retrieve work ignores the influentical factors such as topography and tide, it represents high sensibility in response to the decrease of sediment supply.