This study analyze the spatial connection system in housing development example of domestic and foreign through the mixed-use development of railway depot. Site cases are as follows: Shimura Depot(Japan), Kowloon Bay Depot(Hongkong), Chai Wan Depot(Hongkong), Gare de Montparnasse(France) and Sin Jeong Depot(Korea). Railway Depot caused various problems such as the lack of the feeling of solidarity of local inhabitants and the sense of community. In the case of Hong Kong and a France development example to solve these problems, the architectural characteristics appears. At first it is located facilities such as commerce, duties, the culture. Further, the publicity of the house place is strengthened because an open space, a park are developed on the railroad site. And a variety of connection systems appear between the outside space with a house housing complex built on the artificial ground. Such a point suggests it for Happy Housing Project and Mixed use development carried out in the country recently.