In Shanghai, the migration with household registration from the place inside the inner loop-line to that of outside, brings a series of changes and problems of socioeconomic development, education, health, and public security in both the original and destination places, which is a big problem.This kind of large-scale population redistribution will influence the figures and structure of the city, which will do some benefits for the establishment of new style city combined with rural and urban.With more than 6000 square kilometer of alluvial plain, there are vast development spaces for Shanghai, making possible to enlarge the site of urbanization and building shanghai to be one of the international economic central cities.