Assessing the clustered benefits of various resources in parks based on electrical and carbon synergy is crucial for achieving comprehensive benefit evaluation of the parks. Firstly, key factors influencing the benefits of each cluster within the park are analyzed from three aspects: economic, environmental, and technical benefits. A comprehensive index system and a calculation model for evaluating the overall benefits are constructed, encompassing the target level, foundation level, and indicator level. Relevant economic, environmental, and technical experts score each indicator, and the fuzzy analytic hierarchy process is used to determine the importance and weights of each indicator in the index system. Secondly, an investment evaluation model is employed to determine the benefit scores for each cluster's indicators. Finally, the overall benefit scores for each project are calculated by weighting the scores of each indicator with their corresponding weight coefficients. The simulation analysis of the case study demonstrates that this evaluation method has practical significance for the comprehensive benefit evaluation of distributed resource clusters in parks with electrical and carbon synergy. Through this evaluation system, park investors can select renewable energy technologies that provide the best balance in terms of financial profitability, low-carbon sustainable development capabilities, and technical feasibility.