The high‐sulfur gas sweetening process is energy consuming. To analyze its energy efficiency effectively, and look for ways to improve this process, a novel energy‐efficiency evaluation method based on the yield‐energy‐selectivity and efficiency coefficient methods was proposed. First, the yield, energy, and selectivity are selected as evaluation indicators to establish the yield‐energy‐selectivity evaluation model. Then, the coefficient and score of each indicator were determined by using the analytical hierarchy process and efficacy coefficient method, respectively. Finally, the proposed energy‐efficiency evaluation method was applied to the actual high‐sulfur gas sweetening process. The evaluation results were in good agreement with those obtained by actual experiences.