The author interpreted the main content of the report, introduced and evaluated the innovations and problems that American public, university, and school libraries faced in 2019, and revealed that the basic developing strategy of American libraries is to strengthen social inclusion and responsibility to help solve social problems and their innovating idea is to connect extensively with society. It was found that all service practices of American libraries in the past year were connected with social responsibility. In order to develop continuously , the library has to participate in social development, cooperate extensively with community, and timely express its opinions about social problems.