In the post-epidemic era, Public Library should analysis external  environmental change at the same time of a complete epidemic prevention and control. Synthesize factors including missions, ideas, demands and resources, improve collection development policies, balance offline and online service resources and collect epidemic prevention collections; improve service policies, pay attention to fair and efficiency promotion of service project design. Transfer service emphasis to the community through branch establishing. Offer professional service through unified management of branches and organize small, high frequency and dispersal featured events including family reading promotion, digital reading literacy, epidemic prevention knowledge collections recommendation and propaganda, community housekeeping supply and demand information through professional design. And reveal the value of public libraries at the same time of guaranteeing the readers’ rights of fairly making use of the library.