PROBLEM TO BE SOLVED : To provide a contract support system wherein a real estate company or agent omits the troublesome time and labor of applying again at a new address for a user as a business window at the new address when moving for the user requiring an internet connecting environment and simultaneously functions as a window close to the customers, and method therefor.SOLUTION : The contract support system (100) includes : a privilege storage part (152) for storing the privilege information of at least one of the discount amount of an Internet connection cost, an article and a service; an acquisition part (112) for acquiring the information of a real estate lease contract; a privilege determination part (114) for referring to the privilege information on the basis of the information of the real estate lease contract and determining at least one of the discount amount of the Internet connection cost, the article and the service as a privilege to be given free to the contract candidate of the real estate lease contract; and an output part (130) for outputting the privilege determined so as to urge the application of the Internet connection contract to the contract candidate.COPYRIGHT : (C)2010, JPO&INPIT