The well-preserved frescos of Cave 322 Mogao Grottoes play as the representative of the early Tang dynasty. This paper demonstrates the Sogdian characteristics and "originality"of the colored images inside the shrines by examining the figures holding a sheep or a goat, and the history circumstance under which the cave was established as well. Besides, it conducts a research of the decorative art as for the patterns with design of grapes that are featured by the western regions of Central Asia, the drafts and figures that are partly characterized by Sogdian art to make clear that the frescos of the cave are affected by the Sigdian art. Lastly the paper concludes that the benefactors to the cave are likely to be the Centrtal Asian Sigdian who were stranded and inhabited in Dunhuang judging from the features shown in the donors’ portraits and craftsmen’s inscriptions.