The deep mining of data and the application of technology integration are the main characteristics of a smart society. This paper is to explore the application of multi-technology integration in library smart construction in a smart society, and study the library construction route driven by multi-technology integration. It promotes the transformation of technology empowerment to service empowerment, and provides a reference for the sustainable development of libraries and the construction of a national smart society. This paper analyzes the connotation and research status of multitechnology integration in a smart society. Based on this, it studies the important role of multi-technology integration in promoting the development of library service innovation, and analyzes the specific application of key technologies, such as 5G, IOT, big data, artificial intelligence, block chain and other technologies. Finally, it proposes the route of smart library construction driven by multi-technology integration.