Priming refers to an increase in sensitivity to certain target stimuli due to previous exposure to related stimuli. When an individual is exposed to a stimulus below the threshold of perception, the priming effect that occurs is called a subliminal priming effect. Unlike the memory of directly retrieving information, this process takes place outside the realm of consciousness. The impact of subliminal activation (below the level of consciousness) on humans is an important and interesting phenomenon because it can influence people's choices and actions. Whether it is in free choice or in stimulus-driven choices, there will be some influence. Our research focus of this study is when the subliminal priming effect occurs in the subject's normal choice and questionnaire choices, the intensity of subliminal priming effect has changed or not and how it affects the free choice or the stimulus-driven choice. We suggest that this is of some significance to the interpretation of the mechanism of human free choice.