The invention discloses an IOT-based industrial control system. The IOT-based industrial control system comprises a signal receiving circuit, a signal calibration circuit and a voltage-stabilizing output circuit; the signal receiving circuit receives signals of the input end of a signal transmission channel for a control terminal in the IOT-based industrial control system; the signal calibration circuit is divided into two channels for receiving output signals of the signal receiving circuit; one channel detects abnormal high-level signals by using a composite circuit composed of an audion Q1and an audion Q2; the other channel performs same-phase amplification by using an operational amplifier AR1; after same-phase amplification is carried out by the operational amplifier AR1, signals arerespectively amplified through an operational amplifier AR2 and attenuated through a variable resistor RW1; finally, after performing same-phase amplification by using an operational amplifier AR5, the voltage-stabilizing output circuit performs output after stabilizing voltage through a voltage-stabilizing circuit composed of an audion Q5 and a voltage-stabilizing tube D4; signals can be automatically calibrated; signal stability can be ensured; and thus, signal disturbance is prevented.