Virtual Nuclear Power Plant in the Digital Society Environment Virtual4DS is a full scope and full period simulation and evaluation platform for nuclear safety based on advanced information technology, such as cloud computing, big data, artificial intelligence, etc. Virtual4DS mainly takes the intelligent nuclear design, multi-scale nuclide diffusion, real-time risk monitoring and multiple information based collaborative decision-making as key technologies, aiming at the requirements of reactor safety, radiation safety and environmental impact, nuclear emergency and public safety. Furthermore, it provides comprehensive simulation of large space-time among nuclear power plant, environment and society.