As more work with high intellectual requirement appears, cognitive enhancement has become a topic at the center of the general public's attention. The most typical cognitive enhancement methods include cognitive manipulation, physical exercise, neurotechnology, cognitive training, and cognitive‐enhancing drugs; each has its advantages and limitations. This article analyzes the method that has the greatest potential to be fully applied to society and the method that is more controversial and needs to be regulated strictly to ensure social stability if it is popularized.