The invention provides a compact curing barn controller with an Internet-of-Things function and a fan frequency conversion function, which comprises a main control unit, wherein the main control unitis connected with a frequency converter through an electromagnetic compatibility EMC; the frequency converter is connected with a circulating fan; the main control unit is connected with the circulating fan through a fan drive and a high-speed and low-speed switch; the main control unit is connected with a temperature and humidity sensor through a sensor input; the main control unit is connected with an electric auxiliary heat unit, a heat pump unit, a cold air door and a display unit through an output unit; the main control unit is connected with a networking unit through a communication unit; the networking unit is connected with the communication module; the main control unit is connected with a standby power supply through a current detection unit, a voltage detection unit and the output unit; after the transformation of frequency converter of the compact curing barn, the power consumption decreases obviously, the power consumption is saved by around 30%, the wind speed is soft, tobacco leaves are dehydrates, turns yellow and drys gradually, a large amount of precipitation is formed by the accumulation of aroma substances, the chemical compositions are coordinated, the industryuse value of the tobacco leaves is increased.