A method of controlling a voice input of a terminal supporting a voice recognition function is provided. The method includes controlling a microphone to be in a turn-off state during operation of a voice recognition mode; detecting a first user input for requesting turn-on of the microphone based on at least one of a touch input, a touch pen input, and a key input; controlling the microphone in the turn-off state to be in a turn-on state when the first user input is detected; collecting voice input data of a user through the microphone in the turn-on state; and controlling the microphone in the turn-on state to be in the turn-off state when a second user input for requesting the turn-off of the microphone is detected, and terminating collecting the voice input data.