[Purpose/significance] This paper aims at screening the digital library and constructing the basic model of the endogenous value as well as its knowledge spillover effect on the digital library with the theory of endogenous growth. [Method/process] The digital library was divided into development, storage, application and seven parts at home and abroad. We made an overall analysis and empirical analysis on endogenous variables. [Result/conclusion] It is concluded that the knowledge spillover of the digital library network system has global effects.