As the head of the sixty‐four hexagrams, Qian hexagram is unique in that it is the only hexagram of pure yang, and all six lines are yang lines. The hexagram of Qian hexagram is "Yuan, Henry, Li, Zhen." It summarizes the characteristics of heaven with condensed words, that is, it has the merits of creating all things and making them prosperous and fair. The Qian hexagram not only compares the bright character with the sky, but also uses the dragon as a metaphor to promote the vigorous spirit of the sky and explain the laws of the movement of the sky. It can be said that the sky is the body of the Qian Gua, and the dragon is the purpose of the Qian Gua. As the representative of the sky and the dragon, the Qian Gua is an important part of the Zhouyi. This article intends to analyze the connotation of Qian Gua using the method of interpretation and theory, and discuss the practical significance of Qian Gua on this basis.