Weimojie is the sculpture on the southeast of Cave 220 Mogao Grottoes in Dunhuang Stone Caving. The paper tries to explore Weimojie's emotion from artistic psychological perspective. In the paper, the author finds that the expressive force of human feelings and arts share certain common points, but some differences still remain. Weimojie's emotion in Cave 220 is obviously not natural human emotion, but a kind of artistic form of Mogao Grottoes.