With two case studies in Hamburg, IBA Wilhelmsburg and Hafen-City project, this article has introduced the experiences from Hamburg, where the city government tries to balance the goals between economic growth and identity cultivation. Firstly, the author clarifies the contents of multiple participative urban design pattern and points out that western cities counter a series of challenges such as economic restructuring, diversification of social groups as well as globalization. The Internationale Bauausstellung (IBA) has been developed as important instrument for urban development. With the political support from Hamburgs government, Wilhelmsburg has implemented different urban design projects to strengthen the communication among the local residents, so that the diversified policies could be carried out, such as identity cultivation and enhancement of environmental quality and sustainability. In contrast, Haden-City project focuses on the functional mix and related diversified development pattern in the redevelopment of former harbor area. Accordingly, the organizers of urban design team concentrates on the f lexible urban design principle and provide supports and advices for the diversified urban design in the development and construction process.