In order to meet no overshoot, no deviation and fast set-point control via fan speed. The linear active disturbance rejection control (LADRC) technique was used for designing the set-point controller, and the appropriate parameters that the LADRC controller were selected by parameter adjustment for the set-point control of fan speed. On the one hand, due to the existence of the linear extended state observer (LESO) in LADRC, the influence of parameter fluctuation on the system output could been compensated in a large range, so the control precision and response speed of the system are improved. On the other hand, LADRC controller had a comparison with other controllers that were designed by classical control methods of engine, in order to show its performances. The simulation shows that the LADRC controller is applied to two engine models under completely different flight conditions. The control output still meets the steady-state deviation of zero, not overshoot and the adjustment time is less than 1 second.