Through the rapid growth of Korea for the effectiveness and rationalization of the use of land the development of the underground land is mostly needed. Especially I think that in the limited country(like Korea) when we consider that the population of metropolitan area is almost a third if a total population of this country it is time that we should consider the method of transfer for using of under ground not of on the ground from the legal or systematic recognition of the land. In this respect it is necessary that the person involved in the urban development (the person for architect urban development landscape architect and adminstratives) should pay much attention to the using of the underground spaces.