In recent years，social work institutions are playing a professional service，professional support，social service and innovation and other professional functions. The gradual development of political and social cooperation，social work institutions to enhance the ability to undertake social public services，continue to promote the transfer of government functions. Taking the representative X social service institution as an example，this paper discusses how social work institutions adhere to their own work concepts and principles，show and improve their professional service capability，and win the trust of the government and society in the process of participating in social services.