Provided is an electronic apparatus. A method of controlling the electronic apparatus includes displaying at least one sentence, when receiving a user input regarding at least one character of the at least one sentence that is displayed, analyzing the at least one sentence by using the at least one sentence including at least one character and the at least one character, selecting a character set included in the at least one sentence according to an analysis result, and displaying a selected character set to be distinguished from other characters included in the at least one sentence.