The construction of intelligent water conservancy is among the most significant symbols of high-quality development of water conservancy in the new stage. Over recent years, the Jiangya and Zaoshi water conservancy project has witnessed its preliminary informatization of business platform system. Yet, deficiencies still exist, such as lack of monitoring awareness, difficulties in integrating and sharing data resources, and insufficient intelligence of business applications. On the basis of a summary of existing systems, we propose a construction scheme for the digital twin of Jiangya and Zaoshi project by benchmarking against and keeping in line with the technical requirements of digital twin construction. The scheme includes digital twin platform, water conservancy infrastructure, business applications, network security system, co-construction and sharing, etc. It is an exploration of digital twin for water conservancy project, and also serves as a pilot demonstration of digital twin construction in the Changjiang River Basin.