Social work organization, being one of the important parts of social service, is the form of social workers' professionalization and specialization, and the most essential mechanism of the development of social work, which plays an important role in China's social service and management. The development of social work is decided by the function and nature of social work organization. There are many problems which need to be solved in the system of social work. With the reform of social management, social work organization needs to be improved.