A method for controlling a subordinate electronic device by learning an IR signal is provided. An electronic control device acquires control signal induction information corresponding to an identifier of the specific IR signal upon acquiring a specific IR signal. Alternatively, the electronic control device may support an electronic control device of another space such that the electronic control device acquires the control signal induction information corresponding to the identifier of the specific IR signal. The electronic control device generates a specific IR signal by using the acquired control signal induction information, if a user of a predetermined space or another space intends to control a specific subordinate electronic device. The database acquires a plurality of IR signals in a first space to an n-th space, sorts IR signals not overlapping among the plurality of IR signals, and manages the control signal induction information corresponding to each IR signal not overlapping.