In the case of increasing power demand and increasingly serious environmental pollution, the study on environmental impact of coal-fired power plants on coal-fired power generation projects with coal as the main raw material has certain theoretical significance and practical value. Based on the comprehensive impact of coal-fired power plants on the environment, this paper studies the environmental impact assessment index system and assessment methods of coal-fired power plants in Taiwan. Firstly, the paper analyzes the environmental impact of coal-fired power plants. Then the comprehensive evaluation index system, the selection of evaluation factors, the quantification of evaluation indexes and the evaluation model of the environmental impact of coal-fired power plants are emphatically studied. The analytic hierarchy process (AHP) was applied to determine the weight of each index, and then a comprehensive evaluation model was established using VIKOR method. The whole index system was firstly evaluated from three aspects, namely nature, ecology and economic society, and then the overall comprehensive evaluation was carried out. Finally, the index system and model are applied to the actual evaluation of power plants, and the feasibility of the model is illustrated with an example, so as to provide a method reference for the environmental impact evaluation of power plants.

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