This text is based on the ethical thought, which is representative in western society, and the author finds out the clue of thought of social security which is from mercy to justice.

In the practice,the Humanitarian Buddhism shows more moral concern for the five precepts,ten kinds of goodness and the ways of Mahayana Bodhisattva based on mercy.

Ecological ethics in Buddhism, such as equality, lenity, have been demonstrating the relationship between the nature and human.

According to the comparison of Buddhism mercy view and Confucius Ren studies,this article reveals the similarities and differences of moral construction in Chinese national ethics,and further elaborates these twp ideas molding function as well as their respective value inspiration in contemporary society.

Mercy spirit is Bodhisattva spirit with happy to draw bitter,it s theoretical foundation is the theory of genesis,the main embodiment of trampling the conduct of mercy spirit is in charity and giving up killing on Buddhism.