Public Library as a document information for the public social and cultural institutions,and its development are all closely related with social development.With the government information disclosure process,public libraries,government information is increasingly becoming a part of a public work.How to determine the public libraries open government information services,positioning is always worthy of discussion.This paper argues that public libraries as a public information service in order to preserve the main file different from the governing body should be based on the information needs of the people-oriented,government information,advocacy and service-oriented,and truly become a government information "propaganda members "and the" chief information officer."