The present invention relates to a method of curing and storing sweet potato, which allows sweet potatoes to be cured or stored in a storage for a long time in a storage where the temperature, humidity and air concentration are adjusted, by storing the sweet potatoes in a storage, adjusting the temperature inside the storage with a heating device, adjusting the humidity within the storage with a humidifier, and forcing the inner and outer air to circulate to a ventilation unit through an air supply tube and an air discharge tube to ventilate the inner air of the storage. According to the present invention, the sweet potatoes are prevented from being dried as the humidity within the storage is adjusted by humidifying water the air concentration inside the storage is controlled with circulation of the inner and outer air the curing and long term preservation effects of the sweet potatoes are improved as the humidity of the ceiling and the floor of the storage is uniform the curing effect is improved as the sweet potatoes inside the storage with temperature and humidity control are exposed to ventilated fresh air the surface of the sweet potatoes is cured to prevent virus and fungi production arising from environmental conditions and long term preservation is possible.COPYRIGHT KIPO 2014[Reference numerals] (AA) Start (BB) Adjust temperature inside storage with heating device (CC) Is temperature difference between indoor and outdoor more than 7-8°C? (DD,II,LL,OO,TT) Yes (EE,GG,JJ,NN,SS) No (FF) Operate heater unit (HH) Do temperature, humidity and polluted gas concentration correspond to set values? (KK) Are sweet potatoes cured? (MM) Are sweet potatoes stored? (PP) Ship sweet potatoes (QQ) Adjust temperature inside storage with cooler (RR) Do temperature, humidity and polluted gas concentration correspond to set values? (S100) Stock sweet potatoes in storage (S300) Adjust humidity inside storage with humidifier (S400) Ventilate polluted air inside storage by force-
