SDMS system will bring the latest network technology elements such as Internet of Things, network payment and cloud services (such as: scan code payment, WeChat (APP) payment, NB-IOT Internet of things, LORA low-power long-distance transmission, photoelectric direct reading, Bluetooth communication ) It is applied to intelligent hydropower management system, adopting B/S architecture and modular design, with powerful authority management and data management functions. On the basis of ensuring the stability and security of the system, the system management level and the user experience are greatly improved. It is very suitable for hydropower measurement management of government agencies, universities and enterprises.