People depend on food for living. While the wealthy people are so accustomed to eating meat every day, they rarely concern the affections and privileges of animals, regardless the suffering of their deplorable situation, even less consider to the issue of respect and protect, inevitably neglect to the serious problem of environmental deterioration. The Earth is getting more and more difficult to bear the increasing demands of mankind.The article discusses the issues of high price which wrong eating brings, and the healthy and environmental protect benefits which vegetarianism may bring.