In order to represent increasingly complicated and diversified service requirements thoroughly and accurately, a new Service Requirement Model (SRM) was presented in our service engineering methodology Service Model Driven Architecture (SMDA). In SRM, key elements of service requirement were abstracted from four perspectives: interaction process, organization, resource and information and the rules of SRM modeling were proposed. A case of ocean logistics was presented to reveal SRM construction process. Finally, comparison between SRM and other service models was conducted, and a prototype system for SRM modeling tool was also briefly introduced.