With the development of economy and the progress of technology,the urbanization is obviously quickened.Currently the number and scale of cities are increased.The city population in the world is quickly rising after surpassing agricultural population.The global“city era”has approached.The development of city civilization is the progress of history and influences With the development of economy and the progress of technology, the urbanization is obviously quickened. Currently the number and scale of cities are increased. The city population in the world is quickly rising after surpassing agricultural population. Global “city era” has approached.The development of city civilization is the progress of history and influences