Abstract: Disagreements between the conclusions drawn by different evaluation methods are often found in multi-attribute evaluation. A bargaining combination method is therefore proposed to deal with the multi-evaluation conclusions characterized by disagreement. With the information on bargaining obtained from both evaluation parties, a quadratic programming model based on the minimized total deviation at bargaining points is developed, then the different projects are ranked using the optimal bargaining point picked out. The method has advantages such as coordinating disagreements, integrating the knowledge of evaluators or decision-makers and optimizing evaluation conclusions. A numerical example is given to verify the effectiveness of the proposed method.