First, the theoretical system and practical mode of community work itself. As one of the main methods of social work, community work has a unique set of working principles, steps and methods. Community workers should first understand the particularity and characteristics of their work and master basic professional theoretical knowledge and skills.

Second, the related knowledge and methods of behavioral science and social science. In the process of specialization of modern social work, various modern scientific achievements have been absorbed. If engaging in case and group work needs more knowledge of social psychology, psychiatry and cultural anthropology, then community work needs more knowledge of politics (such as public management), sociology (such as organizational sociology), economics and education.

Third, community background knowledge. A comprehensive and in-depth understanding of the overall structure of the community, services and the functional characteristics of public or private institutions, familiar with community life customs, so as to easily adapt to the working environment and establish positive social relations.

Community work projects are generally determined according to the needs of community residents. Only by putting themselves in the shoes of the community members can the community workers understand the needs of the community and fully respect the personal dignity and equal rights of each community member.

One of the basic principles of community work is to realize community participation, enhance community members' concern and participation in community undertakings, help them find the most critical problems and cultivate people's self-help ability; And promote community development through the same work plan or project.