Purpose - The purpose of this article is to present a subsection circulatory management (SCM) model of Library 2.0. The design idea of Library 2.0 system architecture is to be illustrated and a five-tier model of service-oriented architecture (SOA) is to be put forward and analyzed. Design/methodology/approach - The SOA model conforms to the desires of Library 2.0. Libraries require integration of literature resources, knowledge services and operations management and together all these integrations must be based on the user service. The realization of the concept and technology of Library 2.0 is similar with the SOA model. Findings - Current library management systems (LMS) remain at the era of Library 1.0, which focused on literature management. The new design principles are aiming to manage library resources much better. Library 2.0 must break through the current framework, and adopt a multilayer structure, user-centered and service-oriented system architecture to integrate the resources, the services and managements. Amongst other things, Library 2.0 should utilize the multilayer architecture based on the module mode, improve the flexibility and adaptability of modern management systems, both in system configuration and operational management. Originality/value - The SOA model is applied in Library 2.0 for the first time and is divided into five tiers - hardware tier, system tier, data tier, operation management tier and knowledge service tier. According to the architecture, three application systems - LMS based on librarians, knowledge service system based on patrons, and knowledge search engine, are designed.
