The Four Treatises of Tibetan Medicine was compiled from 8th to the 12th centuries. The most fundamental classic of sowa rigpa (traditional Tibetan medicine), it is one of the world’s best completely-preserved and influential traditional medical texts. It fully shows the development and evolution of sowa rigpa, and has also played an essential role in the dissemination and development of sowa rigpa in the Qinghai-Tibetan Plateau and Himalayan and Mongolian regions. Four xylograph versions and one gold-ink handwritten version of the Four Treatises, which are the proofread and revised editions in different historical phases, are presently stored in Mentseekhang,Tradintional Tibetan Hospital(Tibetan Medical & Astro Insititute) in optimal conditions.