关键词: 福利经济学, 伦理选择, 行为动机, 社会成就, 伦理妥协

Abstract: The thesis probes into the problem of ethical selection of welfare economics to system of economical circulation according to two basic standards of ethic and efficiency. The first it discusses respectively concrete situations about the ethical selection of welfare economics to system of economical circulation according to above two standards. The second it analyses the theoretical difficulties and cause, namely contradiction between narrow theoretical frame of only according to utilitarian ethical base and wide value world, that welfare economics have encountered in selection to economical system according to the second basic standard. Finally, it points out that we can enlarge theoretical frame of welfare economics, dispel theoretical difficulties that welfare economics have encountered in selection of system of economical circulation according to the second basic standard and select efficiently system of economical circulation according to two basic standards simultaneously by introducing deontology as one of ethical base of welfare economics, specially by introducing the method of ethical compromise to solve contradiction between base of utilitarianism and base of deontology of economics.

Key words: welfare economics, ethical selection, ethical motive, social achievement, ethical compromise