Qian Xu-shan was a disciple of the great Confucianist, Wang Yang-ming during the Ming Dynasty. Throughout his life, he educated people about nouslogy. Nouslogy was a philosophy about how to transform spirit. Nouslogy as the most important social trend of the Ming Dynasty. In this article, the author use Marcel's existentialism to examine Qian's death experiences and to explore Qian's methods of reflection and enlightenment. Marcel's I-Thou relation can explain Qian's realization about nouslogy. During his two years in prison, he experienced being on the verge of death. This experience affected his attitude towards life. The author use this perspective as a framework for interpreting Qian's life. Indigerous psychological reaserch provided accurate studies about the Ego, it is also helpful for interpreting Qian's personality.In the past years, the academic communities of the Chinese philosophy did not give a high opinion to Qian Xu-shan's thoughts. The origin of phenomenon came from Huang Li-zhou's misunderstanding. The author wants to clarify Huang Li-zhou's quotation of Luo Nian-an. Huang's misquotation has caused the misunderstanding that Qian's thoughts occurred only in repeated cycles. Actually, Qian argued that his experiences constituted empirical evidence. That is, Qian held that the Self does not exist in reality; one can only experience the Entity through perception. As a result, one should not just have a fantasy of the Entity. Instead, one should practice meditation to include the spirit and live authentically according to the development of cause. In this way one can keep perception of the world sharp and refine one's life, which is a better way of understanding the Entity.