Abstract: Recently, many intriguing studies of power in the perspective of social cognition had been proposed. It was generally acknowledged that power induced a simplified processing orientation that focused on single sources of information and that high power individuals always adopted heuristic strategy for information processing because of cognitive laziness. However, this was inconsistent with the fact that high power individuals were always faced with a complex decision environment and made good decisions. Actually, the effect of power on heuristic versus analytic cognition depended on the primary factors that was triggered by the situation. This paper made a review of the studies about the effect of power on information processing style from the perspective of dual- system model. Then, we put forward that the relationship between power and information processing style was mediated by other factors. Finally, the future research tendencies, including the mechanism of the effect of power on cognition, the principles of assigning roles and the effect of dynamic changes of power on cognition were discussed.