With the advent of the era of knowledge economy, people gradually realize that the capital of their competitive advantage is their own knowledge. Under the network environment, people have a high demand for the quality, timeliness and personalization of knowledge and information, and the scope of their demand has been expanding from the field of science and technology to all aspects of work and life. With the process of social informatization, the development of knowledge organization and socialized service of library has been reflected in knowledge innovation. As a library that provides information and knowledge services for readers, it must be reader-centered to meet the objective requirements. Readers are the foundation of library survival, and readers' evaluation or dissatisfaction with library services should be an important indicator of library work.

The satisfaction index helps the library to correctly and comprehensively understand the satisfaction degree of the services it provides to readers, see the shortcomings of the library's own work, and help the library to further improve its services and improve the service quality for readers. This paper introduces the related knowledge of CSI and the evaluation situation at home and abroad, analyzes the problems existing in the library of Nanchang Hangkong University by means of investigation, and gives some suggestions for improvement.

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