The current study is designed to investigate whether the entrained oscillations could affect performance and infor- mation processing in short-term working memory and an arithme- tic task. According to some previous studies, it is known that the flicker frequencies close to 10.2 Hz increase senior people’s mem- orization of the words that subjects learned before. The current study is neither just studying the effects of entrained oscillation of alpha peak waves, nor focusing a broader range at 0, 6, 11.5, or 18Hz. In the experiment, besides a memory task, subjects also need to do the arithmetic task. Current results indicate that the reaction time of the experimental group is faster than the control group. Entrained oscillations may help people become more sensitive and cognitive.