{Problems to be Solved}To provide support in the mail-order sales for a merchandise provider who has no shops by relaying the live camera video of the merchandise over the Internet and by voice inputting.{Means for Solving the Problem}On reception of an application for a mail-order purchase from a user computer terminal, a web server delivers, to the user computer terminal, a video taken by web camera, a voice input in microphone, and merchandise information converted from the voice input, and processes matters related to the mail-order received from the user computer terminal. An administrator computer terminal registers, in the web server, merchandise accommodated in a live box placed at a freely-chosen place as an object of mail order sales, provides, to the user computer terminal, omnidirectional video of the objective merchandise and voice in real time in accordance with the instruction given by the user computer terminal, and thereby, supports the mail-order operated by a merchandise provider with no literacy of computer.