Based on ICESat data and temperature and precipitation from 2003 to 2010 and used ANUSPLINE interpolation method and Theil-Sen's method,we analyzed and discussed lake water level change characteristic from 2003 to 2010,as well as the temporal-spatial response of lake water level to climate changes.the results showed that most of lakes mainly distribute in the central and western region of TP, and their lake water levels are mainly between 4 500 to 5 000 meters.Lake water level of Tak kyel and Yamzhog Yumco in the southern of TP as well as Panggong in the western of TP showed a decreasing trend.Analysis of the relationship between lake water level and climate factor indicated that lake water level in different basin showed different trends because of varied temperature and precipitation.the increasing trend of lake volume was not only dependent on direct supply of precipitation,but also effected by melted water from glaciers and snow due to climate warming.