This report is the study about the main theme about city and city square which are derived from 9 times of Research of City Square in Oversea Area. Themes are the consept of city square, the consept of center in the city, the difference of situation in the city square at ordinary day and formal day, the relation among then city square and commercial area, the charictaristic performance of symbolic space about city square, the change of space about city square derived by the popularization of cars, the classification of city space and the management as the invisible system
