A multifunctional storage system comprising: a storage chamber; a machinery chamber provided at one side of the storage chamber; a dehumidification part configured to dehumidify circulating air flowing in the storage chamber; a circulating air inlet and a circulating air outlet configured to allow the storage chamber and the machinery chamber to communicate with each other; and a circulation filter unit configured to supply moisture to the circulating air supplied to the storage chamber via the circulating air inlet, wherein the machinery chamber further comprises: a fan unit configured to circulate air in one direction; an intake port and an exhaust port configured to allow outside air to communicate with the machinery chamber; a purification filter unit configured to filter the outside air introduced through the intake port; a first flow path switching member configured to open or close the circulating air inlet; and a second flow path switching member configured to open or close the circulating air outlet; and a first flow path configured to allow the intake port and the fan unit to communicate with each other; and a second flow path configured to communicate with each of the exhaust port, the fan unit, the first flow path, and the storage chamber; wherein in a clothing management mode where the dehumidification part operates, natural humidifying air generated by the circulation filter unit is configured to be supplied to the storage chamber and circulated therein in a state in which the machinery chamber is blocked from the outside air and communicates with the storage chamber, the circulating air inlet and the circulating air outlet are configured to be opened, and the intake port and the exhaust port are configured to be closed; wherein, in an air purifying mode for filtering the outside air, the machinery chamber is configured to be blocked from the storage chamber and communicates with the outside air so that air filtered by the purification filter unit is exhausted to an outside, the circulating air inlet and the circulating air outlet are configured to be closed, and the intake port and the exhaust port are configured to be opened. a storage chamber; a machinery chamber provided at one side of the storage chamber; a dehumidification part configured to dehumidify circulating air flowing in the storage chamber; a circulating air inlet and a circulating air outlet configured to allow the storage chamber and the machinery chamber to communicate with each other; and a circulation filter unit configured to supply moisture to the circulating air supplied to the storage chamber via the circulating air inlet, a fan unit configured to circulate air in one direction; an intake port and an exhaust port configured to allow outside air to communicate with the machinery chamber; a purification filter unit configured to filter the outside air introduced through the intake port; a first flow path switching member configured to open or close the circulating air inlet; and a second flow path switching member configured to open or close the circulating air outlet; and a first flow path configured to allow the intake port and the fan unit to communicate with each other; and a second flow path configured to communicate with each of the exhaust port, the fan unit, the first flow path, and the storage chamber; wherein in a clothing management mode where the dehumidification part operates, natural humidifying air generated by the circulation filter unit is configured to be supplied to the storage chamber and circulated therein in a state in which the machinery chamber is blocked from the outside air and communicates with the storage chamber, the circulating air inlet and the circulating air outlet are configured to be opened, and the intake port and the exhaust port are configured to be closed; wherein, in an air purifying mode for filtering the outside air, the machinery chamber is configured to be blocked from the storage chamber and communicates with the outside air so that air filtered by the purification filter unit is exhausted to an outside, the circulating air inlet and the circulating air outlet are configured to be closed, and the intake port and the exhaust port are configured to be opened.