Based on the reality of Yantian Library, the author introduces the systematic construction mode of "wisdom +" of public library, analyzes the construction ideas, highlights, promotion, implementation measures, service effects of wisdom general-branch library system, and the network sample of "wisdom +" technology integration, management integration and service integration of general-branch library service system. On the one hand, Yantian Library has achieved the popularization of intelligent technology, providing new service modes and means for the construction of general-branch libraries and the improvement of public cultural service system; on the other hand, it has created a smart library system with the characteristics of interconnection and high efficiency, which provides a new entry point for the high-quality development and resources cross-border integration of grassroots public cultural service system. The "Yantian mode" of the construction of the general-branch library system constructs a balanced and efficient public cultural service system with regional characteristics, and improves the service efficiency of public cultural facilities.