Based on the experience of international megalopolis,authors of this paper considered that influential factors of population capacity of the Yangtze River Delta are industry assembling scale,resource support ability and environment capacity.

With the metropolitanization in US in the early 20~(th) century,Megalopolis represented typically by the Northeast seaboard Megalopolitan area in US emerged.

Location of highway rapid passenger transport system in metropolitan area and megalopolis;

Discussion on the definition and comparative studies between metropolitanarea,metropolitan coordinative region and megalopolis;

Through a study of the characteristics of the urbanization in the Zhujiang River Delta in recent years and its future developing tendencies and also in a comparison with such concepts as exo-urbanization urban belts urban districts urban regions and urban agglomerations etc.

Thought of City Horticulture Development in China;