An electronic device and a method for controlling the electronic device are provided. The method includes obtaining an image including at least one question through a camera of the electronic device; identifying the at least one question in the image; identifying scoring information marked by a user for the at least one question in the image; classifying the at least one question according to the scoring information; and based on receiving a user command for displaying an incorrect answer note, displaying a question classified as an incorrect answer question among the at least one question.