Connection device and method of changing operation content of connection device

A method of changing operation content of a connection device which connects a host device and a terminal device, the method comprising the steps of:

• detecting, by the host device, a connection between the connection device connected to the terminal device and the host device;
• requesting, by the host device, the connection device to provide the operation content of the connection device and requesting, by the host device, the terminal device to provide operation content of the terminal device;
• determining, by the host device, whether or not the operation content of the terminal device is superior to the operation content of the connection device;
• transmitting, by the host device, a query for permitting a change in operation data indicating the operation content of the connection device to a server device which manages a usage state of the connection device in order to adjust the operation content of the connection device to the operation content of the terminal device if the host device determines that the operation content of the terminal device is superior to the operation content of the connection device;
• transmitting, by the server device, authentication data used for authentication of a change in the operation data to the host device if the server device permits the change in the operation data of the connection device;
• transmitting, by the host device receiving the authentication data, the authentication data and change data indicating changed content of the operation data to the connection device;
• and
• changing the operation data on the basis of content of the change data after the connection device confirms validity of authentication indicated by the authentication data when the connection device receives the authentication data and the change data from the host device.