According to an embodiment of the present disclosure, an aerosol generating apparatus having a feedback control function includes a heater configured to heat an aerosol generating substrate to generate an aerosol; a controller configured to generate a control signal for controlling power supplied to the heater; a switch configured to perform a switching operation based on the control signal to supply the power to the heater; and a comparison signal calculator configured to receive a signal by the switching operation to calculate a comparison target signal, wherein the controller is further configured to generate a cut-off signal for stopping the switching operation of the switch based on a comparison value calculated by comparing the comparison target signal with a reference signal exceeding a preset range.