Abstract: Li He is the most outstanding poet in the middle Tang Dynasty, and he has always been the focus of academic circles. However, the research on Li He's image is very limited, while study on the myth of Li He's image remains blank. The construction of the mysterious image of Li He shows a kind of interactive process between poetry and biography. Li He's poetry Gong Wu Chu Men is likely to be an invisible source of The Biography of Li Changji written by Li Shangyin. Li He had become a myth in fictions and notes of descendants, leading to the formation of a mythology system centered on Li He, where every story of his is related to one another so as to provide a clear picture of how Li He became a mythical figure. Li He's mythical figure in White Jade Building reveals Li Shangyin's motivation of deifying people, which is because Li Shangyin felt sympathy for Li He's experience when Taoism of Tang Dynasty was popular and people began to rethink that the fate of a poet was always believed to be not good in the history of Chinese Poetry.

Key words: Li He, deification, myth side, Li Shangyin, White Jade Building