The invention provides an intelligent river management platform based on BIM+GIS. The platform comprises a business application system, an information acquisition system, a support platform system, a document management system, a data integration system and a basic service system, wherein the business application system comprises a daily work management platform, a daily inspection and management platform, an emergency event management platform, a monitoring data management platform, a digital transfer platform, a geographic information model platform and a management driving cabin, the support platform system comprises a basic information maintenance platform, a digital transfer platform, a three-dimensional GIS platform and multiple automatic auxiliary decision-making generation tools, and the basic service system comprises a system software layer having multiple types of application software services, a hardware structure layer and a basic network layer. The platform is advantaged in that 24-hour real-time monitoring of the river water quality can be realized, river treatment equipment can be controlled with pertinence according to the feedback field water quality information, and informatization, intelligentization and high-efficiency monitoring modes of river water systems can be realized.