This article analyzed the on-line hotel room reservation system s which had being widely used. Aiming at the advantages and disadvantages of the system s , this article introduced the XPMS theory and put forward a sort of optimized model by using the Web Service technology. The new model can provide sorts of ports aiming at different commercial demands and exchange real-time data under the premise of semantic consistency, which can attract more product providers to join in this network platform and minimize the network cost in the effective range.