In order to solve the bargaining problems of centralized procurement in the environment of e-commerce, we propose the concept of Bargaining Track Chart. The track chart can be used to record the historical bargaining data. These data can provide a useful tool for the analysis of psychological characters of buyers and support current negotiation. Based on the bargaining track chart, the multi-point combination method and the linear extension method for evaluation of the final price are suggested. These methods can provide valuable online information to the negotiators in the bargaining process via intemet. Thus, they can keep away from negotiation trap and achieve better revenue from price bargaining. The bargaining track chart had been applied to the e-commerce system of a centralized procurement center of a big enterprise group in China. The application results are satisfactory