An information terminal (10A, 10a) which includes a scanner (11, 17) that reads and decodes a symbol, a communication unit that performs wireless communication, a display unit, and a memory, the information terminal further comprising a providing means (11, 14, 16) configured to provide, to another information terminal (10B to 10E, 10b to 10e), setting information (31, 33 to 38) to be applied by the another information terminal; an obtaining means (11, 16, 17) configured to obtain individual identification information of the another information terminal from the another information terminal to which the setting information is provided by the providing means; wherein the obtaining means is further configured to obtain the individual identification information by - reading, with the scanner, a first symbol which is displayed by the another information terminal; or - receiving, with the communication unit, a first wireless signal which is wirelessly transmitted by the another information terminal; a registration means configured to associate the individual identification information of the another information terminal obtained by the obtaining means with the setting information provided to the another information terminal by the providing means, and configured to register the individual identification information and the setting information as management register information in the memory; and the providing means further configured to provide the setting information to the another information terminal by - displaying a second symbol based on the setting information on the display unit so that the another information terminal is able to read the second symbol; or - wirelessly transmitting a second wireless signal based on the setting information with the communication unit so that the another information terminal is able to wirelessly receive the second wireless signal. a providing means (11, 14, 16) configured to provide, to another information terminal (10B to 10E, 10b to 10e), setting information (31, 33 to 38) to be applied by the another information terminal; an obtaining means (11, 16, 17) configured to obtain individual identification information of the another information terminal from the another information terminal to which the setting information is provided by the providing means; wherein the obtaining means is further configured to obtain the individual identification information by - reading, with the scanner, a first symbol which is displayed by the another information terminal; or - receiving, with the communication unit, a first wireless signal which is wirelessly transmitted by the another information terminal; - reading, with the scanner, a first symbol which is displayed by the another information terminal; or - receiving, with the communication unit, a first wireless signal which is wirelessly transmitted by the another information terminal; a registration means configured to associate the individual identification information of the another information terminal obtained by the obtaining means with the setting information provided to the another information terminal by the providing means, and configured to register the individual identification information and the setting information as management register information in the memory; and the providing means further configured to provide the setting information to the another information terminal by - displaying a second symbol based on the setting information on the display unit so that the another information terminal is able to read the second symbol; or - wirelessly transmitting a second wireless signal based on the setting information with the communication unit so that the another information terminal is able to wirelessly receive the second wireless signal. - displaying a second symbol based on the setting information on the display unit so that the another information terminal is able to read the second symbol; or - wirelessly transmitting a second wireless signal based on the setting information with the communication unit so that the another information terminal is able to wirelessly receive the second wireless signal.