Abstract: In 5g era，the intelligent application service scene built by 5g technology will provide new development space for the innovation of domestic intelligent library.This paper analyzes the development trend，challenges and opportunities of library functions in 5g era，explore the change characteristics and trends of mobile information service space of Intelligent Library in 5g network environment，the future of its functional application is prospected。It is believed that the application of barrier free body feeling borrowing，panoramic immersive live broadcast，Internet of things intelligent study，accurate information push and AI intelligent analysis will bring great changes to the development of intelligent library.

Key words: 5g era；smart Library；mobile information service；cloud computing；internet of things