Community is a microscopic reflection of the whole society. During the process of social transformation，urban communities have experienced diversification with the progress of market-based economy and urbanization. Different communities demonstrate different traits regarding material space，property-rights relation，residents’ structure，organization mode，social and economic status of residents，neighborhood relationship，and community and social participation. All these characters are due to social migration and social stratification，and have been affected by traditional social governance structure. Different traits are the objective foundation for community construction and governance，and consequently，social governance should also adjust its measures.