Aiming at the issues of interaction among heterogeneous systems in Service-Oriented Architecture platfrom, this paper proposed a loose-couple business integration model in the form of message-driven Webservices which support multiple interactive modes. Consider the demand of service quality for integrated applications, this paper introduced software pipelines for parallel computing and also elaborated on synchronous/asynchronous calling, transaction and congestion control of Webservices based on the approach of remote procedure calling and sliding window mechanism that operates in an equipment reservation system.