The characteristics of climate,hydrology,soil and vegetation in Mountain-Oasis-Desert System(MODS) directly reflect the impact of global change in arid zone.Taking Qiemo oasis ecosystem located in the south of Tarim Basin in the western China and the east of Kazakhstan in Central Asia for example,based on the analysis of MODS macro-characteristics in arid zone,the response of oasis ecosystem to global change is analyzed from the perspectives of the climate characteristics reflected by temperature and precipitation changes,and the landscape characteristics reflected by landscape indexes such as landscape diversity,landscape dominance,landscape evenness,and landscape fragmentation.Meanwhile,the regional response characteristics of global change are analyzed from the coupled relation among ecosystem factors and the ecosystem service value.Furthermore,the dissipation mechanism and the regulation approach of oasis ecosystem are proposed.