Surface albedo,the fraction of surface incident solar radiation that is reflected back to space,which controls surface energy balance and affects the microclimate conditions of ecosystems,is a critical physical variable affecting the Earths climate. In this study,the MODIS albedo products (MCD43A3)from 2001 to 2010 were adopted to investigate the surface albedo temporal and spatial changes in the Source of Three Rivers Region(STRR). The results indicated that the surface albedo decreased from the west to in the east in general in the region. During 2001-2010,the mean surface albedo of STRR was 0. 209,and mostly ranged from 0. 15 to 0. 25. The interannual variability of the surface albedo showed a moderate increase trend over the study period while the seasonal changes of the surface albedo seasonal cycle presents aUshape,which obviously decreased from winter to summer and then increased from summer to winter,with the lowest value appeared in Jun to September. Based on the meteorological data from fourteen climatic stations,the surface albedo had varied correlation relationships with the climate factors,such as temperatures and precipitations,in seasonal time scales rather than in annual time scales. The surface albedo had a significant and negative correlation with the climate factors in spring and autumn but had both positive and negative correlation coexisted in summer and winter. In conclusion,changes in temperature and precipitation can influence the vegetation cover as well as the soil moisture,which therefore affect the surface albedo.