Abstract: Chen Li briefly reviewed the historical background of the publication of Library Service Manifesto. He pointed out that several incidents concerning library service at the beginning of the 21st century call the public attention to the welfare nature of public libraries, and triggered discussions among librarians and library academics. The pilot reform on the cultural system and new policy of “free library, free museum and free gallery” jointly promoted the formulation of Library Service Manifesto. Wu Jianzhong pointed out that domestic library has reached a new level in terms of standardized services and professional improvement in the past 15 years under the guidance of Library Service Manifesto. The revision is an inevitable step towards service of higher quality in the new era, and serves as an important symbol of the maturity of the industry, as well as an open commitment to the joint development of libraries and society. Cheng Huanwen explained the symbolic significance of Library Service Manifesto as reflected in three aspects. First, it symbolized the self-regulation of the industry. Second, it stood for the understanding of the fundamental values of library industry. Third, it bespoke the return to rationality when libraries should think about how to integrate the values of equality and freedom into theoretical research and practices. Zhou Deming, while endorsing the role of Library Service Manifesto in promoting the development of library, reminded us that a higher level of professionalism would be emphasized in the future, calling for the exemplary role of chief librarians, advanced development of librarian team, novelty of technology and the continuity of innovation. Ni Xiaojian believed that Library Service Manifesto, although promulgated 15 years ago, still stood true in terms of its historical significance, guiding the nation towards service concept, people orientation, cultural rights, non-discriminatory service, open and cooperative mentality, and library spirit. We should, in accordance with the requirement of library development and characteristics of libraries of each level, further improve the content of the Library Service Manifesto, and keep the emphasis on the people-oriented service concept that endorses integrity and innovation. Na Yan suggested tapping further into the cultural connotation of Library Service Manifesto, and improving its content while ensuring that we stick to our unique path, answer the call of the times, enable the continuance of services, and remain to be open, inclusive, reciprocal and ready for exchanges.