Purpose/Significance To establish an evaluation index system for subject analysis service in hospital libraries, and to put forward suggestions for the development of subject analysis service in hospital libraries. Method/Process The AHP-DEMATEL method is used to construct an index evaluation model for subject analysis service in hospital libraries,and the hierarchical structure correlation and importance degree of each indicator are analyzed based on the index weight results and the causal relationship quadrant diagram. Result/Conclusion Librarian quality,reader satisfaction, reader perceived usefulness are key indicators of the evaluation system for subject analysis service in hospital libraries.Suggestions such as emphasizing the cultivation of librarian team, improving the construction of subject resources, and enhancing the reader service experience are put forward.