PROBLEM TO BE SOLVED : To provide a system capable of unitary management of entire lease management activities of real estate objects.SOLUTION : The system is provided with an object information input means, an object information storage means, a lessee information input means, a lessee information storage means, a contract information input means for inputting information about lease contracts per lessee, a contract information storage means for storing contract information, a payment information input means for inputting information about payment to payees, a payment information storage means, a money receipt information input means for inputting money receipt information from lessees, a money receipt information storage means, a retrieval condition designation means, a retrieval information extraction means for retrieving and extracting information on the basis of retrieval conditions, an output format storage means for storing output formats, an output format designation means, and a designated format output means for outputting data in accordance with a designated format. Object information, contract information, payment information, money receipt information, and output format information are unitarily managed about real estate lease objects per object, per payee, and per lessee.COPYRIGHT : (C)2006, JPO&NCIPI