Psychological stress refers to the process of psychological,physiological function changes induced by perceived threat of the original stress through cognition and evaluation.Psychological stress is almost always accompanied by emotional reactions,so previous studies on influence of psychological stress on the cognitive function were carried out under certain emotional state.Recent studies have shown that stress-induced glucocorticoid increase and catecholamine and glucocorticoid increase caused by stress-induced emotional reactions have different effects on cognitive functions,which is reviewed in this article.