Abstract: For how to control Quality of Service(QoS) in service-oriented grid environment,the paper conducted a deep research, a QoS model with detailed description was presented. The model was in close connection with the management structure and strategies of grid system, and highlighted its characteristics. In this model, QoS rectuirement of applicadons was submitted as the form of an order. Afterwards, a QoS constraint mapping model was established. The paper also analyzed the relationship between parameters and the definite method of parameters in the mapping model. Actual examples gave the concrete process of QoS mapping and its theoretical and applied value for QoS control in grid system.

Key words: Service-oriented, Urid computing, Quanlity of service, Requirement mapping