Library organization: the business and administrative departments located in the library. An important content of library management is the management of its subordinate institutions, which mainly includes the division and establishment of departments, the determination of the relationship between departments, the division of functions, powers and professional work, staffing, the allocation and coordination of technical forces, etc. The goal of institutional setup is to improve work efficiency. The simplest, clearest and most reasonable institutional setup can make the library an organic whole and achieve its goals more effectively. The organizational structure of the library consists of two parts: the business organization mainly performs the functions of document selection, collection, processing, sorting, storage, provision and utilization; The administrative organization mainly provides conditions for the library's business work, supports and ensures the completion of the business work, and is responsible for secretarial work, foreign affairs, public relations, personnel, finance, security, material supply, medical and health care, and administrative management. The core department of the library is the business department, and its organizational forms mainly include: ① departments set according to the functions of the library. That is to say, departments (usually departments or groups) are set up according to the functions of library literature collection, sorting and utilization, such as interview department, cataloging department, circulation department (or reading department and lending department respectively), reference department, book collection department, special collection department, business research counseling department and so on. Each functional department can also set up subordinate departments at different levels according to the scale, task and language of the library. For example, the cataloging department can also be divided into Chinese cataloging department and foreign cataloging department. Setting up institutions by function is widely used in the world, but it is usually used to manage the library business of ordinary books. (2) Departments according to the category of literature, such as natural science, humanities and social science. This method is also suitable for all kinds of business related to books. (3) Departments set by document language, such as Chinese Department, Western Department, Japanese Department, Russian Department, etc. (4) Departments set according to literature types, such as periodical department, map department (or map department), good department (or manuscript department), patent literature department, audio-visual materials department, etc. Most of these institutions undertake multiple functions. For example, the periodical department is often responsible for the collection, cataloging, classification, collection and circulation services of periodicals. ⑤ Departments divided by reader groups, such as Children's Service Department, Elderly Service Department, University Library, Teacher's Reference Department, Disabled Service Department, etc. ⑥ Departments set according to the service scope or area, such as branch libraries of public libraries or university libraries, mobile book carts, etc. ⑦ Departments set up according to technical equipment, such as microfilm room, computer application room and audio-visual room. Because each library will be different in type, nature, task, scale, leadership style, collection organization and so on, and the institutional setup will also be different. Small libraries and professional libraries usually adopt a single form, while large libraries usually set up institutions in various forms. Internationally, large and medium-sized libraries generally have technical departments (including acquisition, book selection, cataloging, warehousing and other sub-departments), public departments (including reference, circulation, periodicals, copying and other sub-departments) and administrative departments (including accounting, personnel, construction, stationery and other sub-departments). The responsibilities of some major business departments of the library are: (1) Acquisition department or document collection department: according to the nature, tasks and readers' needs of the library, formulate collection construction policies and document collection plans, carry out document selection, document collection and acceptance registration, enrich the collection, establish a scientific collection system, and coordinate the procurement of documents and materials. (2) Document Cataloging Department: Classify, catalog, process, organize cataloging, reveal and report the collections, and establish a collection catalog system. (3) Document Collection Department: responsible for the organization and management of basic stacks, preserved stacks or storage stacks, handling book delivery and shelving, and protecting documents in stacks. (4) Lending Department: responsible for readers' investigation and registration, issuing loan certificates, borrowing books and periodicals in the collection, carrying out interlibrary loan, taking charge of the original statistics on the circulation and utilization of books and periodicals, and managing various reading rooms and cashier desks. Guide readers to use the library catalogue, publicize and recommend books and guide readers to read. A library without a collection department is also responsible for the organization and management of stacks and book protection. (5) Interlibrary Loan Department: providing interlibrary loan services for individual or collective readers and handling loan procedures. In a library without interlibrary loan department, the lending department is generally responsible for lending. (6) Bibliographic Reference Department: it is mainly responsible for compiling bibliographic indexes of various topics, answering readers' inquiries and guiding readers to use reference books such as bibliographies, indexes and abstracts. (7) Information Research Department: To provide services for scientific research and planning decisions of relevant departments, individuals or collective readers by compiling or providing information research results such as abstracts, summaries and special research reports. (8) Periodical Department: responsible for the whole process of periodical collection, registration, processing, binding, preservation, reproduction, reading and borrowing. For a library without a periodical department, the relevant departments such as editing, lending and so on are responsible for all the work of periodicals. (9) Special Collection Department: responsible for the management and circulation of rare books, manuscripts and other special collection materials. (10) Business Research and Guidance Department: mainly responsible for the research and experience exchange on the business reform and development of the library, system or local library, and for the business guidance of the library affiliated to the system or local library. (1 1) Library and Information Science Research Department: responsible for the selection, organization, appraisal, promotion and practical research of library and information science research topics in the library, the system or local libraries. (12) Computer Technology Application Department: responsible for the planning, network organization, application and development of computer technology in the library, the system or the local library. In the international library field, it has always been a hot topic whether the university library system (that is, the system composed of the main library, branch library or reference room of each college or department) and similar systems are centralized or decentralized. The experience of many libraries shows that the best way is to centralize the collection and arrangement of documents (to decentralize the selection of books) and decentralize the services; All the libraries in a system are part of the system, and all the work should be arranged as a whole.