PROBLEM TO BE SOLVED : To provide a layout processing method using network allowing a person to virtually arrange a housing related product such as furniture or electric product on the floor plan of an object of real estate to confirm the layout of the object of real estate, confirm whether this layout is possible in an actual dimension or not, and further purchase the housing related product while confirming the layout.SOLUTION : In this layout processing method using network, a terminal 12, a retrieval Web server 2, a Web server 3, and a commodity database server 4 are mutually connected through the Internet N.