a receiver configured to receive a data including a content;

a microphone;

a communicator; and

a processor configured to:

process the received data for displaying the content on a screen,

based on a first user voice input being received through the microphone while the content is displayed on the screen, identify whether the first user voice input corresponds to a trigger voice,

based on the first user voice input corresponding to the trigger voice, change a mode of the electronic device to a voice recognition mode and display a first user interface (UI) indicating that the electronic device is in the voice recognition mode, and

based on a button of an external device being pressed and a second user voice input being received through the communicator from the external device after the button of the external device is pressed, change the mode of the electronic device to the voice recognition mode without identifying whether the second user voice input corresponds to the trigger voice and display a second UI indicating that electronic device is in the voice recognition mode and a third UI indicating that the second user voice input is being recognized in the voice recognition mode,

wherein the trigger voice is a predetermined phrase set by a user.