In order to provide an intelligent building having specific rooms in which relatively less wealthy persons may use, and meeting the demands for specific rooms and privacy for the general public at the same time, by optimizing the space efficiency. The intelligent building comprises: permanent exclusive rooms resided by a resident, which cannot be used except by permission of said resident; time-share exclusive rooms, which is usable by residents residing in a plurality of permanent exclusive rooms but cannot be used by others except by permission of said resident during a period of time used by said resident; at least one of a means for time-share exclusive passage, which connects one permanent exclusive room to one time-share exclusive room according to movement, wherein said means is usable by residents residing in a plurality of permanent exclusive rooms but cannot be used by others except by permission of said resident during a period of time used by said resident; and a server, which communicates with permanent exclusive rooms, time-share exclusive rooms, and means for time-share exclusive passage, and thereby capable of collecting information therefrom, and which controls permanent exclusive rooms, time-share exclusive rooms, and means for time-share exclusive passage according to predetermined rules.