Abstract:although big data technology has not only been applied in the field of water conservancy projects, but also will become an important technology for intelligent water conservancy construction. But for many practitioners in the water conservancy industry, the big data technology is still in the stage of abstract concept. Taking the quality risk management of water conservancy projects as the starting point, the big data technology which is mainly composed of quality risk management framework and strategies, is expounded, discussed and analyzed, in order to provide some reference for colleagues in the industry to understand the operation mechanism of big data technology in water conservancy projects.