The invention belongs to the technical field of watershed management and provides a water environment intelligent management platform for river and lake watershed. The system combines the real-time monitoring system of multi-source data of river and lake basin, automatic data transmission, storage and intelligent analysis system, the multi-source data fusion visualization system on the same platform, aiming at realizing more comprehensive, scientific and efficient management of the water environment of the river and lake basin. The invention relates to a water environment intelligent management method of the river and lake watershed, which comprises the following steps of: real-time monitoring water quality factor, ecological factor, environmental factor, hydrological characteristic factor, building information factor and external destruction factor. Water quality factor is subjected to remote sensing inversion by multi-spectral UVA, the detecting indexes includ total nitrogen, total phosphorus, ammonia nitrogen, chemical requirement COD, chlorophyll, and the distribution of water quality is obtained by post-processing analysis. The real-time monitoring of ecological factors is toobtain orthophoto images through UAV remote sensing. The invention is mainly applied to environment monitoring occasions.