This paper presents a way of planning a “floating city” which is able to float and submerge in the sea and has the integrated functions of residential, tourism, commercial and culture, etc. in the deep sea environment. Its sustainable design strategy includes the concepts of zero carbon, energy saving, waste recycling and management, self-sufficient facilities and a new stereoscopic traffic system. The aim of the project is to enable people to see the magical scenery in the ocean which are not available on the land, and to propose a new way to construct a new and high quality artificial island.