When obtaining an ID code from a user who holds out an arm to a corresponding merchandise in a noncontact manner, respective information terminal devices accept a registration input of the corresponding merchandise. When accepting the registration input of the corresponding merchandise, registration merchandise information including obtained user identification information and merchandise identification information for identifying the merchandise corresponding to the information terminal device is transmitted to a server device. The server device stores and manages merchandise sales information for the respective ID codes from the registration merchandise information received from the respective information terminal devices. When the ID code is input from a settlement device, the merchandise sales information corresponding to the ID code is transmitted to the settlement device. The settlement device performs the settlement processing based on the merchandise sales information received from the server device.