By focusing on the whole life cycle management of power plant and adopting advanced technologies in design, management and control, an intelligent, digital and visualized large power plant will be constructed, which represents the top level of integration system of management and control in the current power plants. In the development of digital power plant, it also experiences a process from part digitization to whole digitization. In the previous schemes of digital power plant, digitalization basically only means a part, or one function of the digital system. In this paper the panoramic architecture and scheme assumption of new digital power plant are proposed, based on the analysis of whole life-cycle management in power plant, and the definition, analysis and research of digital engineering system, digital control system and digital management system.