Abstract: The large-scale irrigation districts have the characteristics of wide spatial scope, multiple types of node structures and scattered characteristic data. There are many kinds of information and huge amounts of data involved in the large-scale irrigation districts. At present, conventional manual inspection and measurement methods can not meet the requirements of efficient management and utilization of information in the irrigation districts. In order to improve the informationization level of the irrigation districts management, based on the modern information technology such as GIS and the big data, a framework of a mobile intelligent management system for a large irrigation district based on GIS is developed, and its system modules and functions are divided according to the permanent monitoring and management projects of the irrigation district. Finally, taking the People's Victory Canal in Henan Province as an example, a GIS-based mobile intelligent management system is developed. By using this mobile intelligent management system, we can timely and accurately understand the changes in monitoring indicators recorded at each remote monitoring station and the node structures at the irrigation district, and provide a scientific basis for efficient utilisation and modern management of water resources of the large irrigation district.