This paper puts forward a new method of group decision mak-ing:democracy method of group decision making. It is able to solve two different problems of grade division and group evaluation. This method uses the new concepts such as decision-making degree,nominal grade mem-bership value and actual grade membership value and so on. and sets up the principle of“that the minority is subordinate to the majority”.Its good use of individual decision information makes the results of group de-cision meet the demands of the majority.