Failure to meet specific standards for slope stability conditions may result in the potential collapse of the slope, either partially or completely. The article focuses on slope engineering and examines the structure and components of a comprehensive digital twin system. It also explores the digital technologies used in this system and assesses its unique features and innovative applications in slope construction. The architecture of the digital twin system for rock slopes must cater to the requirements of multiple professionals, comprehensive process coverage, and data-centricity. It should ensure the separation of software and personnel, with key technologies such as 3D geological modeling and rapid updates, GIM+BIM coupling modeling, and challenging techniques like cutting and sealing. Independent innovation is crucial to address these key technologies. During the slope construction period, the digital twin system of rock slope is utilized to intelligently screen unstable blocks. This innovative approach has been successfully implemented and verified in numerous large-scale rock mass projects, with favorable implementation conditions.