Electronic apparatus and controlling method thereof

A method of controlling an electronic apparatus comprising a communication module configured to wirelessly communicate with an external remote controller, a main memory configured to store at least one instruction, and a main processor configured to execute the at least one instruction, the method comprising:

• transmitting, by the main processor, a first control signal for mapping a key value corresponding to a first key from among keys included in the external remote controller with a function from among a plurality of functions capable of being performed by the electronic apparatus to the communication module, based on product information of the electronic apparatus stored in the main memory;
• mapping, by the communication module, the key value corresponding to the first key with the function based on the first control signal;
• and
• controlling the main processor, based on a signal corresponding to the key value corresponding to the first key being received from the external remote controller, to perform the function.