Abstract: Waterhead is a dominant factor for controlling the development of the Yellow River's new wetland.The change of flow-sediment condition results in the variation of coastline, land area, land cover and environment of the Yellow River estuary.In this paper, the feature of flow-sediment and the corresponding variation in the Yellow River estuary are monitored and analyzed based on the remote sensing for the nearly several years before and after 2000.The result shows that the Yellow River estuary extends toward the sea direction and land area increases in the new flow-sediment environment but not evidently In general, the environment quality in the estuary is improved.And the flow-sediment condition of 2003 is perfect.