It is of significance to study the effect of land use change on ecosystem service values. Based on TM image data in 1990, 1995, 2000 and 2005 of the Upper Reaches of Ganjiang River, this paper analyzes the land use change and its consequent changes in ecosystem services value in the watershed from 1990 to 2005 by RS and GIS technology. The results show that the total ecological services value exhibits an increasing trend from 1990 to 2005. The total ecological services value of the upper reaches of Ganjiang River has less change from 1990 to 1995, which the total ecological services value has been continuously increasing and it is to exist the larger fluctuation in somea ecosystem function services from 1995 to 2005. The ecosystem services value sensitivity index of each land use type is less than 1, indicates that the ecosystem services value of the Upper Reaches of Ganjiang River lacks flexibility on its service value index.