Integrated energy system becomes future trend of energy field. It is vital to perform comprehensive evaluation to ensure the maximal energy efficiency and security of operation. Evaluation system of integrated energy system is established from reliable, economic and environmental capabilities, combining properties of distribution network and heating network. Due to dimension and illegibility of indices, fuzzy comprehensive evaluation is applied. Weights, which convert appraisal matrix into comprehensive score, are determined by anti-entropy weight method. Through case study, the feasibility and validity of evaluation system is proved and device configuration is proposed. Result indicates that mini gas boilers don’t suit CHP system when distributed PVs and electric boilers suit it well.