Policies are orchestrated in a service model of service-oriented architecture system, wherein the service model includes at least a plurality of service components and dependency relationships among the plurality of service components, and at least one of the plurality of service components is subject to specified policies. Vertical policy orchestration is performed on each of the plurality of service components in the service model to obtain the effective policies of the service component. Horizontal policy orchestration is performed on an application domain basis to obtain the effective policies of the plurality of service components in each application domain.