In view of the characteristics of the current power system,such as transient power quality with short duration,wide random and hard to be detected,the wavelet-based Clanguage algorithm to detect transient power quality solution methods has been proposed.After several times experiments and algorithm debugging,results show that the wavelet transform can quite accurately identify the moment when the transient voltage transient changes in the time domain.By using control system,it can take effective measures to improve power quality.