This paper proposes a new model of “Expert Group Selecting of Decision-Makers” which describes the attributes and characteristics of the experts group more properly. It simplifies the metrical index of experts group and reaches at the perfect evaluation effect so that decision-maker can put experts group selecting in practice easily. Before selecting, we quote the technique of “the experts evaluation system” to judge the effectiveness of this model such that we can use this method to select the experts group more effectively and correctly.