The stability of a multi-degree controlled system with output time delay is analyzed in this paper. The delayed time is induced by filters which are used for signal processing. The range of time delay, in which the controlled system is stable, is confirmed by the theory of stability switch. And the effective controlled process is studied in the stable range. According to the result of stability analysis, an effective controller is designed by changing the delayed time of the system. And simulations are performed on a cantilever beam to validate the method proposed. Solutions appear that the attenuating speed of response of the system is improved up to 80% after control.