Abstract: In construction of water conservancy and hydropower projects, the curtain grouting amount is large, it is necessary to use IoT monitoring system for entire process of intelligent grouting to replace the conventional grouting recorder to standardize the construction operation.In this paper, an IoT monitoring system for entire process of cement grouting including pulping machine, grouting pump and slurry storage barrel was designed.This system integrated intelligent sensors, PLC,Internet of Things gateway modules and other equipment.The data crawling technology of IoT gateway cloud server was used to realize the collection and processing of data such as slurry flow, slurry density and pressure, and touch screen human-computer interaction and data storage functions are accessible.In addition, the system realized remote IoT transparent display and control.The system was applied in the grouting test of Xiong′an Regulating Reservoir in the Middle Route of South-to-North Water Diversion Project.The results show that the system ran stably and the data was real-time, which laid a foundation for the realization of intelligent grouting and control in the whole process.