In order to improve water conservancy informatization,solve the problems of massive heterogeneous data management decentralization and outdated display platform of water conservancy informatization,and realize the goal of digitalization,standardization and modularization management of water conservancy information,this paper designs and implements a large screen visualization system of intelligent cloud service platform for reservoir group. The system is based on Vue front-end visualization open source framework and Spring Cloud micro-service back-end development framework,which uses WebSocket data transmission protocol as the core to drive full-screen information communication and interaction. Based on WebGIS geographic development library Cesium.js,ECharts,DataV and other application component libraries,a set of large screen visualization integration scheme is designed,which provides a visualization platform for multi-terminal collaboration and information sharing for water conservancy achievements display,and can promote effi cient utilization and scientifi c management of water resources in the basin. The application examples show that the visualization system integration technology can realize the visual and vivid all-round display of water resources information in the basin,which has high application prospects and reference value,and thus can provide technical support for effi cient development and utilization of water resources.