In recent years a considerable literature has come forth dealing with information aggregation in group decision-making using the tools of game theory By analyzing group members’ incentives and rational behaviors in group decision-making, this game theoretic literature gives out some important insights against people’s intuition The research developments in this field are systematically reviewed from four aspects, which are acquisition of decision information, information revelation during deliberation, influence of transparency, and optimal decision rules The research on information aggregation in group decision-making based on game theory is compared with the traditional mainstream research on group decision-making in economics, politics, management science, and social psychology And the advantage of using the tools of game theory is analyzed for studying information aggregation in group decision-making Finally the shortcomings of the existing research are presented