Land is the carrier of various terrestrial ecosystems,while land use is an indispensable activity to human's living and development.It is also the interaction area between human being and nature,so the change of land use cover would impact the structure and function of ecosystem unavoidably.Based on the Constanza's ecosystem service value theory and using the coefficients advanced by Xie Gao-di and co-works,who made a table listing the ESV of unit area in land ecosystem and providing the average unit price of ESV in China,this paper calculated the change of the ecosystem service values(ESV) in 1996 and 2005 of Guangzhou City,Guangdong Province respectively.The results showed that the ESV had been changed a little and increased 108 million yuan RMB from 1996 to 2005 due to the change of cropland and other agricultural lands to residential and water lands and the high ecosystem value coefficient(VC) of water,while the average ESV(Ave(ESV))dropped 30.11 percent due to the expansion of residential and commercial land.The calculation also indicated that the coefficients of sensitivity(CS) were all inelastic.The change of cropland impacted the security of foodstuff of Guangzhou City,while the change of water mainly influenced the ecosystem service function.