The present invention relates to a method for supporting a financial service of a provisionally contracted real estate purchaser/lessee through a planner. The method comprises : a first step of extracting M (M > = 1) number of information on a real estate for sale; a second step of providing the extracted M number of information on a real estate for sale and checked planner information to an application of a wireless terminal of a user; a third step of receiving provisional contract progressing request information to provide the provisional contract progress request information to an application of a wireless terminal of a planner when at least one information on a real estate for sale is selected as a provisional contract progressing target; a fourth step of receiving and storing purchaser/lessee information, contract amount information of a contract target real estate, contract target real estate address information, and provisional contract check information from information included in contract contents; and a fifth step of configuring user information, the contract amount information of a contract target real estate, the contract target real estate address information, and provisional contract information for a real estate on a user side to provide the configured information to one or more terminals on a financial institute side.(100) Operating server(105) Planner information storage unit(110) Offerings information storage unit(115) Contract condition information receiving unit(120) Planner information checking unit(125) Offerings information extraction unit(130) Information providing unit(135) Provisional contract processing unit(140) Provisional contract check information receiving unit(145) Financial service support unit(150) Payment processing unit(155) Planner DB(160) Offerings DB(165) Storage medium(170) Planner wireless terminal(175) User wireless terminal(180) Seller/Renter terminal(185) Broker terminal(AA) Communication network(BB) Planner information(CC) Real estate offering information(DD) User information(EE) Contract condition information(FF) Real estate offering information(GG) Exclusive planner information(HH) Provisional contract progress request information(II) Provisional contract checking information(JJ) Planner location information(KK) Financial service support informationCOPYRIGHT KIPO 2019