Abstract: In the field of service computing，there are always a number of different services with the same or similar function.In this paper，considering the management and selection of services with the same function，a structure definition of service Agent model is proposed，on the basis of BDI Agent.Service Agent supports the dynamic binding of services.Then the paper introduces the service Agent modeling GUI framework，which is designed and implemented according to the service Agent model.In the framework，a session-based protocol of multi-agent negotiation is implemented.At the end of the paper，an example is introduced.

Key words: service computing, service Agent, Agent negotiation

摘要： 在服务计算领域，相同功能的服务往往有多个不同的选择。针对同类服务的管理和选择问题，在BDI Agent的基础上，提出了一种服务Agent的结构定义，用以支持服务的运行时动态绑定；设计并实现了基于会话的约束求解服务Agent协商协议；实现了支持服务Agent建模的可视化工具；最后介绍一个应用实例。

关键词: 服务计算, 服务Agent, Agent协商