The article reviews the history of health research in the library in China, and then it finds that health information service is a new research field that has emerged in the library community in recent years. In the post-epidemic period, health information services become the new basic responsibility of libraries. Meanwhile, the libraries need to preparate in the areas of information security, information value-added. At last, the article designs the 4S health information service framework of the library summarizes the main service contents.