The present invention discloses a refrigerator and a humidity control method for the same. The refrigerator comprises a humidity controller to controllably maintain moisture and/or perform humidification. The humidity controller is configured to: set a target humidity value, measure an actual relative humidity value of a target space, and calculate a target water replenishing mass W based on a difference between the two values and a current temperature of the target space; measure and calculate a water replenishing time T, and adjust the humidity controller so as to maintain its maximum humidifying rate Vmax within the time T to achieve the humidification purpose; and adjust the humidity controller so as to maintain a humidifying rate consistent with a water vapor loss rate in the target space to achieve the moisture maintaining purpose.