关键词: 多属性决策, 项目经济评价, 模糊数, 可能度分析

Abstract: The traditional project economic evaluation tends to turn fuzzy information into real number in the process of dealing with fuzzy indexes，which leads to invalidity in real world.Therefore，this article applies fuzzy number theory to project economic evaluation.Firstly，this dissertation establishes a set of multi-attribute economic evaluation index system.Secondly，with the interval number theory，the quantification of the project qualitative indexes and the standardization of the project quantitative indexes are discussed.For the multiple attribute project economic evaluation approaches，possibility analysis method is employed.Through these works and an example，this paper means to make meaningful explorations and improvements for the traditional project economic evaluation methods.

Key words: multiple attribute decision-making, project economic evaluation, fuzzy number, possibility analysis