The author studies the legends of dragon in West Regions and India and points out that though the worship of dragon was a common part of belief in inland China, West regions and India, the ideas of dragon were different. By making an analysis of the spreading of the worship of dragon from West Regions to inland China, the author draws a conclusion that many forms of art of inland China such as the dragon-lifting dance, magic arts and forms of literature concerned with dragon probably originated from West Regions.