Abstract: This article delves into the background, core principles, key technologies, system architecture, functional applications, challenges and response strategies, as well as future prospects of the digital twin system of Tianmen Hydrological Station. The aim is to explore the construction direction of digital twin hydrological stations through the construction of this system, and to promote the modernization of hydrological stations. As an important hydrological monitoring station in Hubei Province and even the whole country, Tianmen Hydrological Station's digital twin system construction not only enhances the processing and analysis capabilities of hydrological data, but also provides more intuitive and intelligent support for disaster prevention and reduction. Through the detailed explanation in this article, we hope to provide more comprehensive and in-depth references for research and practice in related fields.