Meta Services is a combination of many types of services. Meta Services could be describes as a concept that used in service layer for increased the reusability. With Meta Services, user can access the workflow through this service layer, and they execute the workflow by calling their service. Besides, Meta Services describes a way of abstracting and mapping a workflow to a service in computational Grid environment.  By using this, a workflow could adapt various service concepts such as Grid services, Web services, and Portal services without modification to the workflow. Meta Services also enables a workflow in Grid environment that can adapt various service concepts such as Grid services, Web Services, and portal service without modification to the workflow. Furthermore, historical performance data could be included in Meta Services and making a possible effective execution of the workflow.