关键词: 利益衡量, 伦理学方法, 程序性规则, 非形式论证

Abstract: Substantial justice requires the legitimacy of the judgment, and the academic circle hopes to complete the legitimacy argument through the interest measurement. Traditional interest measurement tends to construct formal reasoning methods in the field of value judgments, which are accompanied by inconsistent contradictions, including the dilemma of interest stratification, the dilemma of interest ranking, and the dilemma of value standard influence. The improvement of interest measurement requires the reshaping of specific methods: the use of ethical methods to construct acceptability standards， the use of discussion theory and argumentation rules to construct procedural rules， the use of informal argumentation as a logical guarantee to verify conclusions. The improved interest measurement can guarantee the legitimacy of the conclusion from two aspects: reasoning and argumentation.

Key words: interest measurement, ethical method, procedural rules, informal argumentation