In this paper, EMOS is described first.The business process of Long-term trade subsystem in EMOS is selected to be anatomized and the process property is analyzed.

• 本文先对电力市场技术支持系统进行了简单介绍，选取了电力市场技术支持系统中的长期交易管理子系统做了具体的流程研究，分析了其流程特点。