The invention discloses an Internet of things intelligent fan system and belongs to the technical field of draught fan and ventilation system engineering. The Internet of things intelligent fan system comprises a temperature sensor, a vibration sensor, a noise sensor, a detection box, a monitoring mainframe, a client side, a display screen and a frequency-variable control cabinet, wherein the temperature sensor, the vibration sensor and the noise sensor are installed on a draught fan; a parameter collecting module and a data communication module are arranged in the detection box; the frequency-variable control cabinet is connected with a frequency-variable motor of the draught fan; the parameter collecting module collects parameter data of the temperature sensor, the vibration sensor and the noise sensor in real time and meanwhile collects the parameter data of voltage, current and power of the frequency-variable motor in real time through the frequency-variable control cabinet; the parameter collecting module conveys the collected parameter data to the monitoring mainframe through the data communication module in real time after the parameter data are subjected to analog/digital conversion; the monitoring mainframe feeds the result back to the client side and the display screen after analysis. The Internet of things intelligent fan system can monitor the operation state of the draught fan in real time, displays the operation state in real time and gives an alarm in time.