Based on the Landsat TM images on June 5,1986 and June 4,2009,the paper carried out the research for the land use/cover change in the Yellow River Delta.The regional evapotranspiration(ET) was estimated based on the Surface Energy Balance Algorithm(SEBAL) model and analyzed the quantitative feature and spatial patterns of wetland evapotranspiration and its response to land use/cover change(LUCC).The results showed that the land use/cover types in 58.74% of the total areas had been changed during 23 years.Un...