There is provided a system including: a control device mounted on an aircraft and configured to control the aircraft, the aircraft having a battery, and a wireless device configured to use power stored in the battery to provide a wireless communication service to a user terminal; and a module that is physically attachable to and detachable from the control device, in which the control device has a housing that includes a module attachment and detachment unit, and an electrical connection unit configured to electrically connect the module to the battery when the module is attached to the module attachment and detachment unit, and the module has, a power receiving unit configured to receive power from the battery, and a communication processing unit configured to use the power received by the power receiving unit to communicate with the wireless device.