Abstract: The factors which influence inductive reasoning are different from the mental effect of induction.The factors which influence the inductive reasoning include: knowledge,working memory and character.The brain mechanism of inductive reasoning was reviewed based on the research of neuro-psychology and brain imaging.The neuropsychological research showed that left dorsolateral(BA 8/9) prefrontal gyrus showed greater activity during induction.But the research in the field is still very poor as so far,there is lo...