Introduction to Roof garden Strategy in Architectural Design and City

The roof garden has great functioning of smoothing the shortage of land resource in the city and making use of the land resource diversity and efficiently. The modern era, following the fast development of economic and society, people have a high claim to green roof or roof garden. It is an efficient and reasonable way to exploit the open space the roof of the building. From the classic roof garden of the world, we can find out that roof garden has close relationship with the building. Roof garden is different with other kind landscape in the city it needed cooperation of landscape architect and architect from at the stages of design, construction, upholding and management. We should attach importance to roof garden in the construction of building. But the research works, policies and laws about the green roof and roof garden were not developed so fast to catch up with the development of economic and society. So many contradictions have appeared. In this paper, all the contradictions were picked and dissected, and the ways to solve them were given: 1. The technique and design ways of the working team should be trained, 2. The whole process of a roof green's construction should be supervised by the government, 3. Laws and policies guide should be given, 4. Much more research work on roof green or roof garden should be done.