The invention relates to a blinking activity detection method and a blinking activity detection system in sleep state analysis. The method comprises the following steps of: after the sleep process of a user is begun, acquiring a real-time electrooculogram signal and a real-time electroencephalogram signal of the user; performing wavelet decomposition respectively for the real-time electrooculogram signal and the real-time electroencephalogram signal, and rebuilding the electrooculogram signal and the electroencephalogram signal; intercepting a low-frequency lectrooculogram signal by using a slide window having a set signal amplitude and time length; respectively calculating a correlation coefficient of waveforms of the electrooculogram signal in the slide window and the electroencephalogram signal at a same moment, a quickness parameter of a waveform peak of the electrooculogram signal in the slide window and duration of the peak; and if the correlation coefficient, the quickness parameter and the duration respectively meet a preset correlation coefficient threshold value, a quickness parameter threshold value and a duration threshold value, determining that a blinking activity exists in the electrooculogram signal in the slide window. By adopting the method and the system, the blinking activity in the electroencephalogram can be accurately detected, and the sleep state analysis accuracy can be improved.