Abstract: In the Web service trading market,there is a common phenomenon with low success rate of single bidding transaction between buyer and seller.The paper proposed a double auction strategy with invisible negotiation space on Web service.The strategy proposed defines a bidding negotiation space containing the cost and quoted price of both parties.According to the different environment of service supply-and-demand,the strategy adopts different fast negotiation models to bargain.Extensive simulation results show that the strategy improves the success rate of Web service transaction.Furthermore,it makes the bilateral parties of service transaction transform the traditional,single and fixed incomes into variable interval’s incomes according to the market environment.Meanwhile,the results illustrate that the strategy proposed in this paper is propitious to guide the buyers and sellers to adjust quoted price with the change of the market environment objectively.

Key words: Web Service,Service auction,Service negotiation