A mask device according to an embodiment of the present invention comprises: a mask cover, which has air suction ports, and has, mounted thereon, filters for filtering air flowing in through the air suction ports; a mask body, which is coupled to the rear of the mask cover, and has an air ejection port through which air having passed through the filters passes; fan modules, which each comprise a fan and a fan motor, are disposed between the mask body and the mask cover, and allow the air having passed through the filters to flow toward the air ejection port; and a control part, which controls the number of revolutions of the fan motors, and predicts information about the lifespan of the filters so as to provide the predicted information about the lifespan of the filters to a user.