Under the background of sustainable development, library, as a public welfare cultural institution, should take on its own social responsibilities to develop new service models to meet the social needs and help the development of the society and at the same time ensure library's development. IFLA put forward new requirements for libraries to take on social responsibility in <Libraries and the Sustainable Development Goals: A Storytelling Manual>. The author believes that library must integrate social responsibility into its strategy plan and on the basis of experience summary, take on social responsibility which is within its power and suitable to local social development. The library should also carry on publicizing work to expanding social impact so as to get best social effect.