SUMMARY: Sponge City is a new urban model with both flood control and ecological and environmental protection functions. Its construction depends on the design and planning of urban water systems and ecosystems. As Shenzhen moves towards the construction of marine city, an imporant issue is how to utilize the system concept and intelligent technology so as to strike a balance between urban development and ecological protection. Adiran McGregor Coxall, an Australian master of urban design and landscape design and planning, introduced the idea of ecological urbanism, a regenerative integrated ecological urban design and construction system. Drawing on his rich experience in Australia and China, Mr.McGregor also systematically illustrated current practice and opinions of sponge city.