PROBLEM TO BE SOLVED : To enable a real estate agency to quickly recognize customer needs and propose real estate items matched with the needs at a low cost, suppress the loss in the case of dealing items to be truly ' sold' , and acquire latent customers and to enable a customer to quickly and inexpensively obtain the real estate item matched with his/her desires by presenting the plan of real estate to be sold to the customer prepared on the basis of the needs from the customer to obtain the real estate and the real estate to be sold. SOLUTION : This real estate planning supporting equipment is constituted so as to receive purchase desire information regarding the real estate, receive sales information regarding the real estate item, output item plan preparation information for preparing a virtual item plan regarding the real estate item on the basis of the purchase desire information and the sales information and receive and output item plan information relating to the virtual item plan prepared based thereon.