A mobile terminal, comprising: a display unit; a microphone; and a controller configured to: display an execution screen of a specific application including at least one content on the display unit, wherein the controller is further configured to: determine whether or not a function corresponding to a scroll input is set when the scroll input is received through the display unit, wherein the function is not to activate the microphone, activate the microphone in response to the scroll input when the scroll input is a first pattern scroll input, wherein the first pattern scroll input corresponds to scroll input in a diagonal direction or taking the form of a specific character or figure, or perform the function and activation of the microphone in response to the scroll input when the scroll input is a second pattern scroll input, wherein the second pattern scroll input corresponds to scroll input to the left, right, upward or down ward direction, the function is scrolling the at least one content of the execution screen based on a direction of the second pattern scroll input, receive user voice through the activated microphone, and search for a specific content related to a keyword included in the received user voice from the execution screen of the specific application displayed on the display unit. a display unit; a microphone; and a controller configured to: display an execution screen of a specific application including at least one content on the display unit, wherein the controller is further configured to: determine whether or not a function corresponding to a scroll input is set when the scroll input is received through the display unit, wherein the function is not to activate the microphone, activate the microphone in response to the scroll input when the scroll input is a first pattern scroll input, wherein the first pattern scroll input corresponds to scroll input in a diagonal direction or taking the form of a specific character or figure, or perform the function and activation of the microphone in response to the scroll input when the scroll input is a second pattern scroll input, wherein the second pattern scroll input corresponds to scroll input to the left, right, upward or down ward direction, the function is scrolling the at least one content of the execution screen based on a direction of the second pattern scroll input, receive user voice through the activated microphone, and search for a specific content related to a keyword included in the received user voice from the execution screen of the specific application displayed on the display unit. display an execution screen of a specific application including at least one content on the display unit, wherein the controller is further configured to: determine whether or not a function corresponding to a scroll input is set when the scroll input is received through the display unit, wherein the function is not to activate the microphone, activate the microphone in response to the scroll input when the scroll input is a first pattern scroll input, wherein the first pattern scroll input corresponds to scroll input in a diagonal direction or taking the form of a specific character or figure, or perform the function and activation of the microphone in response to the scroll input when the scroll input is a second pattern scroll input, wherein the second pattern scroll input corresponds to scroll input to the left, right, upward or down ward direction, the function is scrolling the at least one content of the execution screen based on a direction of the second pattern scroll input, receive user voice through the activated microphone, and search for a specific content related to a keyword included in the received user voice from the execution screen of the specific application displayed on the display unit. determine whether or not a function corresponding to a scroll input is set when the scroll input is received through the display unit, wherein the function is not to activate the microphone, activate the microphone in response to the scroll input when the scroll input is a first pattern scroll input, wherein the first pattern scroll input corresponds to scroll input in a diagonal direction or taking the form of a specific character or figure, or perform the function and activation of the microphone in response to the scroll input when the scroll input is a second pattern scroll input, wherein the second pattern scroll input corresponds to scroll input to the left, right, upward or down ward direction, the function is scrolling the at least one content of the execution screen based on a direction of the second pattern scroll input, receive user voice through the activated microphone, and search for a specific content related to a keyword included in the received user voice from the execution screen of the specific application displayed on the display unit.