A franchise estate industry to store during deployment of the estate for enhancement of the efficiency of the operation support system, installed in cooperation, a retrieval, the cooperation of the estate information and identification information including information and an output slip property, and server system, installed in the contract, and customer information and identification information of the cooperation of the real estate and identification information can be input to the system and can be transmitted to the server, the server from office system can contract data store computer and contract. The server system, cooperation of the estate of identification information and identification information and identification information of the customer to receive and store a contract of the estate transaction associated with identification information is stored in the storage device and, by a customer payment contract when input is associated with the identification information of the estate transaction in cooperation and store a predetermined charge and store contracted.