The Dunhuang Manuscripts in the Tibetan language are a most valuable treasure for Tibetan studies. The manuscripts are scattered in the Bibliothèque Nationale de France, the British Library in the United Kingdom, Toyo Bunko in Japan, and various places in China. This paper critically reviews the already published catalogues and transcribed texts of these Tibetan manuscripts, with a special introduction to recent publications in various institutes in Gansu Province in China. Although most of studies of the manuscripts concern historical works, scholars must devote more attention to Buddhist works, because most of the manuscripts are Buddhist works. Unfortunately, these Buddhist works still remain unexplored. This paper suggests manageable projects which can be done with these Buddhist works.