Abstract: The infrastructure construction period of power plants is characterized by a long cycle,high risks,numerous participants and complex specialties.The traditional manual inspection and paper-based record-keeping mode have problems such as information lag,inefficient collaboration,and weak safety control,and can no longer meet the intelligent control requirements during the infrastructure period of power plants.To solve the above-mentioned problems,the second-phase infrastructure project of a certain Binhai power plant of Huaneng is taken as the research object.Firstly,build a unified management platform integrating internet of things(IoT),big data,cloud computing,building information modeling(BIM),and digital twin technologies.Realize real-time perception,dynamic analysis and intelligent decision support for on-site personnel,machinery,materials,processes and the environment.Secondly,analyze the specific application scenarios and implementation strategies of the system in the five core links of safety control,progress coordination,quality assurance,cost control,and multi-party collaboration,and verify the significant achievements of the system in improving management efficiency,reducing safety risks,ensuring project quality,and enhancing investment returns provide theoretical references and practical paradigms for the digital and lean management and control of large and complex projects.