[Purpose/significance] This paper defines the connotation of library wisdom service, constructs the data model that supporting intelligent service, and discusses its methods and processes to promote the realization of intelligent services.[Method/process] This paper explains the meaning of the intelligent service in library, puts forward the relationship model between intelligence degree and interactivity, frequency, response time, depth of data perception of library services, discusses the influence of different data on intelligent service, and gives different ways of data acquisition.[Result/conclusion] Data is a necessary support for modern library to realize intelligent service. Libraries must rely on sufficient skills and patience to mine potential data of users, and realize rapid, in-depth and flexible intelligent services based on corresponding data interaction.