SOA是一种架构模型，它可以根据需求通过网络对松散耦合的粗粒度应用组件进行分布式部署、组合和使用。服务层是SOA的基础，可以直接被应用调用，从而有效控制系统中与软件代理交互的人为依赖性。-SOA is an architecture model, which can demand through the network of loosely coupled coarse-grained application components distributed deployment, composition and use. Service layer is the basis of SOA can be applied directly to call, so as to effectively control system of software agents that interact with human-dependent.