Zhang Zai's philosophy is full of environmental ethics. Its ontology of “void gas” recognizes the natural ontological status; Its epistemology considers that obtaining knowledge of the outside world through people' own senses is limited, but “moral knowledge” is “extraordinary far”; Its anthroposophy proposes researchful object with the heart. If you don’t research object with the heart,you may correct evil doings and revert to good deeds. The evil in “the nature of temperament” becomes the good of “born nature”; Its ethics emphasizes “universal love”, which hope to treat all the human and the nature with love.