The Fifth Plenary Session of the 19th Central Committee of the Communist Party of China pointed out that China has turned to a stage of high-quality development, which has created new opportunities for the development of public libraries. This article combines the exploration and practice of public libraries to summarize ten new themes of public libraries in the period of high-quality development, including public digital culture and high-quality service system construction, cultural and tourism integration and theme library, big data and artificial intelligence technology empowerment and smart library, library service brand marketing, strategic management and 2035, modernization of governance ability and library innovation culture, macro-security management and emergency service.