Abstract: PLC is a kind of industrialized MCU, which is designed for the complex environment in industrial production. It has become the standard device of automatic control. It is a common method in the industrial environment that PLC equipment is used as a monitoring center to collect real time data and to manage the production site. In order to achieve remote monitoring of PLC pipeline scene, web technology is used to combine IO signal and animation display of PLC to simulate the working condition of pipeline, in order for the graphical remote monitoring system to be realized with improved the presentation and accuracy of remote monitoring system.