PURPOSE : To efficiently retrieve and introduce an object matched with a buyer' s or borrower' s request as close as possible to introduce an object of which quick contract is required when plural objects having equivalent conditions are retrieved. CONSTITUTION : When a condition requested by a real estate buyer or rental requester is set by a retrieved item setting means B in each object retrieving item and the retrieval of a retrieving means D is started, the object retrieving means D retrieves an object to be introduced from an uncontracted object data storing means A and an introduced object presenting means F displays or prints out the information of the retrieved object to present object guide books G1, G2 or the like.