A control terminal and a method of controlling thereof, include receiving and group setting tasks or steps. The receiving task/step receives a selection of a first device, from among a plurality of devices, and a group setting operation for the first device. The group setting task/step, when the first device was previously selected, receives a first client selection of at least a second device, from among the plurality of devices, as a client, and generates a group setting that includes the first device and the at least the second device.