Abstract: [Purpose/Significance] In the digital era of the Internet of Things, data-intensive academic research paradigms have accelerated, promoting the reconstruction of research libraries' new knowledge service ecology based on massive resources and data. With the development of smart libraries, "web-scale discovery service" has become the core functional module for the implementation of intelligent services in the next-generation library service platform. Which kind of next-generation library service platform is more suitable for building web-scale discovery services? How to build web-scale discovery services? These are issues that the library industry pays more attention to in building smart libraries. [Method/Process] This article mainly adopts a research method that combines literature review with case studies. It reviews the current research status of "web-scale discovery service" both domestically and internationally, and uses the Shanghai Library as a case study for empirical research. It takes the exploration of intelligent data service mode of Shanghai Library's third-generation service platform as the research object, reviews the technical path, resource strategy, data management, and service methods of the web-scale discovery services based on the FOLIO platform micro-services architecture, and explores new ideas and new technologies for improving the value of knowledge services through "user-centered" web-scale discovery services in the digital transformation of libraries. [Results/Conclusions] Micro-services architecture is a service-oriented architecture with high flexibility and scalability. Based on the FOLIO platform's micro-service architecture and using the open-source discovery tool Vufind as a resource discovery portal, libraries can build their next-generation service platform suited for building web-scale discovery services in smart libraries. This platform allows customization and expansion of additional intelligent service modules as needed, to meet different levels of service demands. Therefore, the author suggests that libraries should choose the open-source FOLIO platform, which utilizes micro-service architecture to serve as the next-generation service platform for smart libraries. Additionally, librarians are encouraged to customize and develop personalized web-scale discovery services, considering their specific needs. Due to the fact that the research object of this article is a large-scale research library in China, the practical experience and research methods presented here have certain limitations. We hope that the research conclusions of this article can provide references for librarians when selecting and implementing relevant systems and services for building web-scale discovery services.

Key words: research library, micro-services architecture, FOLIO, web-scale discovery service, Vufind portal