An input device which includes a sensor, a microphone, a communicator, and a processor configured to, based on an operation of a user being identified based on a value sensed through the sensor, transmit utterance intention sensing information to an electronic device, based on a command to initiate a speech recognition and feedback information being received from the electronic device according to the utterance intention sensing information transmitted to the electronic device, activate the microphone and provide a feedback according to the feedback information, and transmit a voice signal received via the microphone to the electronic device.