From the perspective of Sheng Sheng philosophy, Zhang Zai constructs the ontology of Qi's integration of gathering and dispersing from the understanding of 'Sheng Sheng is called Yi'.Starting from the fact that all things in heaven and earth are transformed by one breath, and that the breath gathers and disperses without birth and death, the metaphysical way of heaven is related to the realm of physical humanity, and the view of life and death is generated that the life and death of human beings are the gathering and dispersing of the breath, and the death of human beings is not to return to nullified, and death and life have life and death.This gasification view of life and death is not only connected with the 'one Yin and one Yang' of the way of heaven and earth, but also with the 'dry said father, the mother said mother' of the 'combination of heaven and mother' concept, and then produce 'existence, I shun things, no, I Ning also' shun life and peace of death.This transcendence of life and death has a profound influence on the philosophy of life of later generations, and also reflects zhang zai's historical return to the patriarchal clan thought of 'family doctrine' from the perspective of 'life'.