The paper uses multi-temporal remotely sensed data from 2002 to 2013 to analyze the temporal-spatial changes of vegetation coverage in Shannan,Tibet,China by applying Mann-Kendall test,multivariate regression analysis,and geographical information system (GIS)spatial analysis.Next,land surface temperature combined with precipitation information are input to a vegetation-climate temporal-spatial model for quantitatively estimating contribution rates of climate change and human activities to vegetation coverage.The results demonstrated that the average annual vegetation coverage rates were 60.16%-63.26% from 2002 to 2013.The areas of high,mid-high,moderate,mid-low,and low coverage rates covered 40.96%,14.07%, 14.93%,14.16%,and 15.88% of the studied area,respectively.The tendency of the vegetation coverage change in the studied area had been stable for the 12 years,the decreased and increased vegetation coverage rates accounted for 11.8%and 3.18%,respectively;The climate change acted as the dominant factor for influencing vegetation cover change.However,human activities can accelerate the vegetation change rate,reduce or enlarge the vegetation coverage areas in a short time period.Thus,the contribution rates of climate factors and human activities to vegetation cover decrease were 93.75%and 6.25%,and the contributionrates of climate factors and human activities to vegetation cover increase were 75.57%and 23.43%,respectively.