Abstract: The output characteristics of bistable system with tunable parameters are analyzed,and the main factors influencing system output are illustrated.The parameter-induced stochastic resonance is demonstrated by analyzing the system response speed.In order to detect the input signal with large parameters,the system parameters are changed continuously to achieve optimum system response speed.When the system response speed is suitable for the input signal changing,the best system output can be gotten.Then,by recovering this output signal,the recovery signal which is close to the input signal can be obtained.The correlation coefficients between the input signal and the output response of various system parameters are discussed.It is demonstrated that the parameter-induced stochastic resonance is feasible to be used in signal detection with large parameters.The presented method is used to detect periodic and aperiodic signals,and better results are obtained, proving that the method is effective and practical.