Abstract: With the development of engineering projects in water conservancy and hydropower industry, building information modeling (BIM), big data and intelligent technology find very broad application in this industry. Since its initial digital construction, a large number of applications have been accumulated in all the stages of a project life cycle – design, construction, and operation management ? forming a certain application scope and depth. This paper summarizes the representative digital application cases in large and medium-sized water conservancy and hydropower projects in China and abroad covering the stages of design, construction, and operation management, analyzes the status quo and existing problems, and gives an outlook on the developing trend, so as to help further integration of digitalization and information technology into the industries.