The objective of this paper is to probe into the application of the genetic algorithm and the agent technol2 ogy which have been used in many areas , to the online negotiation in the e-business , as a quantitative and optimized method. Firstly , the paper compares three negotiation models based on the agent technology. Secondly , it divides negotiation models into eight ones according to a set of standards and locates the suggested model in one of them and then defines the objectives and characteristics of negotiation support systems based on the agent technology. Further2 more , the paper suggests a negotiation model using the agent and the genetic algorithm technology and simulates the model in order to validate it . The outstanding characteristic of the model is the ability of learning and developing ne2 gotiation strategies during the process of negotiation.