Museums are an important component of China's public cultural service system, and the construction of high-quality museums is an inevitable trend in the current development of museums. Improving the evaluation index system can detect the current level of service quality development and also help guide the future development direction of museums. By crawling online comments from museums and combining with the LDA model, key evaluation indicators were determined, and the indicators were revised and improved to construct a museum service quality evaluation index system, which included 5 primary indicators and 20 secondary indicators. The CRITIC method was used to calculate weights and the final evaluation score, and relevant service improvement suggestions are provided for 30 provincial-level museums nationwide.