The invention discloses a demand response effect evaluation method based on fuzzy comprehensive analysis. Based on power grids and social demands, reliability, economical efficiency and environmental protection are used as three indexes for measuring a demand response effect. According to the reliability index, the participation way of a use, response time and the reliability degree of response capacity are mainly measured in the demand response process. According to the economical efficiency index, the cost of the unit response capacity for carrying out a demand response and the reduction of the power grid valley-to-peak difference due to a demand response event are mainly measured. According to the environmental protection index, after the demand response is carried out, measurement is mainly carried out from the environmental pollutant discharge quantity and the user energy consumption level. In the index calculation process, the indexes difficult to quantize are expressed in a relative value or level mode, and understanding and calculation are easy. In the index solution process, a fuzzy comprehensive analysis method is adopted, the problems that the evaluation indexes are fuzzy and difficult to quantize can be solved well, and the method is suitable for different demand response stages of the different power grids.