Abstract:According to the requirements of the state and smart water conservancy, and based on the general requirements for smart water conservancy, this paper analyzes the importance of building smart Yellow River, and puts forward the concept, reference architecture and six capacity characteristics of smart Yellow River. Smart Yellow River, guided by the concept of harmonious coexistence between man and nature, and organically driven by the many factors (including scientific and perfect management system and mechanism, laws and regulations, technological standards, engineering technology, information and communication technology), is a dynamic balance process to realize healthy and harmonious symbiosis of the natural water system, economic society system and water ecological environment, aims to make Yellow River a happy river for the benefit of the people. Smart Yellow River is the concrete realization of smart water conservancy in Yellow River Basin. The main construction contents are described, including the construction of digital twin watershed, watershed simulation platform and intelligent business application system; the guarantee measures are put forward. Building a digital scene of Yellow River Basin and mapping the history and current status of physical geography, economy, society and ecological environment in the affected areas of the Yellow River basin to the information space is the basis of smart Yellow River; Constructing the digital twin basin of the Yellow River and realizing the twinning between the key objects of the basin and their twins is the key to the realization of smart Yellow River.