Method of registering code set of control target device using remote control

A method of registering a control code of a control target device using a remote control, the method comprising:

• receiving, by a set top box, a manual setting key code message including a key code for manual setting from the remote control or receiving an event for requesting a start of manual setting;
• when a response message for the start of manual setting is received from the remote control or the event for requesting the start of manual setting is input, requesting, by the set top box, to display at least two manufacturers capable of manual setting to the control target device;
• requesting, by the set top box, the number of code sets stored in the remote control corresponding to a manufacturer selected by the remote control;
• requesting, by the set top box, to display a plurality of indexes to the control target device, so that the number of code sets provided from the remote control can be displayed;
• when an index selected from the plurality of indexes displayed on the control target device is provided from the remote control, requesting to display the selected index in such a manner as to be distinguished from other indexes to the control target device, and requesting to transmit a control code constituting a code set corresponding to the selected index to the control target device;
• and
• when the control target device is remotely controlled by the control code requested to be transmitted, terminating the manual setting according to a request from the remote control or by an input event.