PROBLEM TO BE SOLVED : To provide a system allowing a customer of one real estate agency to visit another real estate agency at ease.SOLUTION : In this real estate industry support system, private information of the customer of a first real estate agency is registered by a second registration means 112 and a mail including the private information is transmitted to the mail address of a second real estate agency selected by the first real estate agency, by a fifth processing means 125. The second real estate agency can thus grasp the private information of the customer of the first real estate agency beforehand through the mail transmitted to the mail address. The second real estate agency introduced to the customer from the first real estate agency is selected within the range of the specific real estate agencies whose data are registered by the first registration means 111.