To provide a merchandise selling and buying device by which a customer can easily and quickly order a financial product and information showing evaluation about approval/disapproval of the customer's order can be easily and surely changed.

An accessing part 103 accesses a financial institution 110 by referring to customer information inputted from an inputting part 102. A selling and buying financial product inputting part 104 and a selling and buying price inputting part 105 receive a selling and buying financial product name and its selling and buying cost from an order information managing part 101. A selling and buying performing part 106 refers to the selling and buying financial product name inputted by the selling and buying financial product inputting part 104 and the selling and buying price inputted by the selling and buying price inputting part 105 to performs selling and purchase. An access disconnecting part 107 immediately disconnects the access to the financial institution 110 after the completion of the selling and purchase performance.