An electronic device, comprising: a voice obtaining microphone configured to receive a voice signal including a noise at a first level; a noise obtaining microphone configured to receive a voice signal including a noise at a second level higher than the first level; a controller configured to: estimate the noise at the second level from the voice signal received by the noise obtaining microphone, remove the noise at the first level from the voice signal received by the voice obtaining microphone based on the estimated noise, and perform an operation corresponding to the voice signal having the noise at the first level eliminated therefrom; a body unit forming an exterior of the electronic device; and a rotational frame configured to rotate along a circumference of the body unit by being coupled with the body unit, wherein a first seat recess having the voice obtaining microphone seated thereon and a second seat recess having the noise obtaining microphone seated thereon are disposed in the rotational frame, and wherein the controller is further configured to move the noise obtaining microphone in a direction having a highest noise level by rotating the rotational frame based on a noise level of the voice signal received from the noise obtaining microphone characterized in that the voice obtaining microphone is configured as a multitude of voice obtaining microphones (322a, 322b, 322c) disposed at prescribed distances from each other wherein the electronic device is configured to move, wherein if the electronic device moves, the controller is further configured to remove the noise at the first level from the voice signal received by a preset specific voice obtaining microphone among the multitude of the voice obtaining microphones (322a, 322b, 322c), and to perform the operation corresponding to the voice signal having the noise at the first level eliminated therefrom, and wherein if the electronic device stops, the controller is further configured to perform the operation corresponding to the voice signal received by a prescribed one of the multitude of the voice obtaining microphones (322a, 322b, 322c) except the specific voice obtaining microphone. a voice obtaining microphone configured to receive a voice signal including a noise at a first level; a noise obtaining microphone configured to receive a voice signal including a noise at a second level higher than the first level; a controller configured to: estimate the noise at the second level from the voice signal received by the noise obtaining microphone, remove the noise at the first level from the voice signal received by the voice obtaining microphone based on the estimated noise, and perform an operation corresponding to the voice signal having the noise at the first level eliminated therefrom; estimate the noise at the second level from the voice signal received by the noise obtaining microphone, remove the noise at the first level from the voice signal received by the voice obtaining microphone based on the estimated noise, and perform an operation corresponding to the voice signal having the noise at the first level eliminated therefrom; a body unit forming an exterior of the electronic device; and a rotational frame configured to rotate along a circumference of the body unit by being coupled with the body unit, wherein a first seat recess having the voice obtaining microphone seated thereon and a second seat recess having the noise obtaining microphone seated thereon are disposed in the rotational frame, and wherein the controller is further configured to move the noise obtaining microphone in a direction having a highest noise level by rotating the rotational frame based on a noise level of the voice signal received from the noise obtaining microphone characterized in that the voice obtaining microphone is configured as a multitude of voice obtaining microphones (322a, 322b, 322c) disposed at prescribed distances from each other wherein the electronic device is configured to move, wherein if the electronic device moves, the controller is further configured to remove the noise at the first level from the voice signal received by a preset specific voice obtaining microphone among the multitude of the voice obtaining microphones (322a, 322b, 322c), and to perform the operation corresponding to the voice signal having the noise at the first level eliminated therefrom, and wherein if the electronic device stops, the controller is further configured to perform the operation corresponding to the voice signal received by a prescribed one of the multitude of the voice obtaining microphones (322a, 322b, 322c) except the specific voice obtaining microphone.