A refrigerator includes an upper door, a lower door positioned below the upper door and configured to be extended out of and retracted into the lower storage chamber, wherein the lower door includes a drawer part having a storage space and a door part configured to open and close the lower storage chamber, respectively, a draw-out, an ascending and descending mechanism provided at the drawer part and configured to ascend and descend the storage space, a driving mechanism provided at the door part and configured to provide a driving force to the ascending and descending mechanism, a controller to control the driving mechanism, a microphone module provided at the upper door and configured to receive a voice input from a user, and a voice recognition module to allow the controller to control the driving mechanism in response to the voice input from the user.