Abstract: In order to evaluate the benefit rationality of the natural gas distributed energy system in theprocess of promotion,the applicability evaluation model was studied. The applicability index systemwas built from system characteristics,economy,energy efficiency,environment and other aspects. Setpair analysis theory was used to build a comprehensive model for semantic classification evaluationgrade. The analytic hierarchy process was applied to calculate the index weight. The final applicablelevel was determined by calculation and verified taking a hotel in Xi'an as the example. The resultsshowed that the evaluation results were great reference. Economy and environment were the key factorsaffecting the applicability of the current system. Compared with the traditional energy supply method,the energy saving efficiency of the natural gas distributed energy system was 12.35%. The system savedenergy significantly and gave full play to the advantages of stepped energy supply. The reduced annualoperating cost was 5.086 1 million yuan and the simple payback period was 6.61 years. The promotionof natural gas distributed energy system obtained higher benefits in low gas price areas. Close-