Urban public space has played an important role in flourishing public life through history. It has been a place for communication, cultural events, commercial exchange, recreation, etc. among people in the city. But today, various behavior in public space and public life are declined. One of the reason is neglecting the user's need when urban public spaces are planned and managed. This study examined the role and types of urban public space through literature survey and found the reason for its decline. After those, case study was examined. The method of it was qurestionarie survey and selected areas were Ansan City, Gunpo City, Teheran Ro in Seoul. The conclusion of case study are simmarized in three points. First, users' preference pattern on the urban public space was different according to age, object, livling areas. Second, as a result of Factor Analysis, users perceived the urban public space at a pattern of openness, beauty, convenience. Third, users' perception pattern was different to some variables, especially age and living area.