"Accessibility" is a new system that develops from the field of health services, it performance evaluates the effectiveness of public services from the perspective of public perception. The article first outlines the concept of accessibility, its development, and its connotation. It uses the method of literature review to introduce the research frameworks of the existing health service evaluation, civic education evaluation, and public cultural service evaluation. Finally, it constructes  the indicators framework of evaluation of library service accessibility from  four dimensions of availability, accessibility, acceptability and adaptability, which based on the explanation of the theoretical basis for the evaluation of library service accessibility.