Abstract: With the proposed goals of “carbon peaking and carbon neutral” and new power system construction, further development of regional integrated energy system is an important way to achieve these goals. Combined with the case of a representative park integrated energy system project, a combination of subjective and objective hierarchical analysis-entropy weighting method is used to determine the weight of the index combination, optimizing the shortcomings of a single hierarchical analysis method to determine the weight of too subjective. By normalizing the data, the quantitative and qualitative indicators are fused, a fuzzy judgment matrix is established, and comprehensive evaluation is carried out by the fuzzy comprehensive evaluation method. The overall performance score of the system is given in combination with the evaluation level of the integrated energy system.