The Tibetan Plateau (TP) has the largest number of lakes in the world. Hydrological stations cannot be readily set up in this region due to the high altitude and remoteness. Satellite radar altimetry has become a very important alternative to in situ observations as a source of data. By combining eight sets of altimeter data, the trends of the changes in the water levels for 361 lakes in the TP during 2002 to 2021 were estimated, and the spatio-temporal changes in lake levels were explored.