Temperature control method, device and equipment for roasting furnace

The invention provides a temperature control method, device and equipment for a roasting furnace. The method comprises the steps that the first temperature of a first component in the roasting furnace and the second temperature of a second component outside the roasting furnace are obtained; determining a control signal according to a preset target temperature and the first temperature; the preset target temperature is obtained according to the current temperature stage of the roasting furnace; adjusting the temperature of a second component outside the roasting furnace according to the control signal and the current second temperature until the first temperature of a first component inside the roasting furnace is adjusted to a third temperature along with the temperature of the second component; the error between the third temperature and the preset target temperature is within a preset error range; according to the scheme, the problems that in a nonlinear time-varying and large-lag system, robustness of tem