介绍了江苏省大运河监测调度系统的组成，重点介绍了该系统中采用的上位机软件--Citect软件。Citect软件是一个大型的工业级SCADA软件，具有很强的I/O功能、数据处理功能和网络功能。在系统中Citect作为数据采集和通信控制软件控制整个系统的正常运行，同时为运行管理人员提供了一个浏览、查询监测数据以及发布操作控制命令的人机界面。

A brief introduction on system composition of Jiangsu Grand Canal monitoring control system for regime of flow is given in the paper,and the emphasis is puton the upper computer softwareCitect.Citect is a sophisticated SCADA software in the industrial control domain with powerful functions inclucling I/O processing,data acquisition and processing,and its best advantage in the complete support of computer network.In this system,Citect can control the normal operation of the whole system,and at the sametime,it provides a manmachine interface for operational personnel to browseand inquire monitoring data and issue control instructions.