An electronic apparatus and a method of controlling the electronic apparatus are provided. The method includes: receiving a voice command; and if the voice command is a first voice start command, changing a mode of the electronic apparatus to a first voice task mode in which the electronic apparatus is controlled according to further voice input, and if the voice command is a second voice start command, changing the mode of the electronic apparatus to a second voice task mode in which the electronic apparatus is controlled according to the further voice input received via an external apparatus which operates with the electronic apparatus. Therefore, providing efficiency and flexibility in controlling the electronic apparatus by using a microphone of the electronic apparatus or a microphone of the external apparatus.