A semiconductor display enterprise has large energy usage volume, low daily management efficiency, limited targeted improvement measures; energy consumption record analysis is manually processed at fixed intervals, time-consuming and inefficient; energy consumption data is not shared systematically, unable to effectively mine energy saving points, already participating in government-required carbon emission and carbon quota control, but lacking corresponding digital means support.Greatech Eastwisdom helped it achieve energy and carbon emission data collection, storage, statistical analysis, energy saving diagnosis, optimization control, and comprehensive management in 6 factory areas of Shenzhen-Huizhou Park, reducing energy consumption and improving energy utilization rate under the premise of stable system operation. Build a set of digital and intelligent management system for visible energy consumption, known energy consumption, controllable energy usage, and carbon emission management. According to evaluation, it brought overall economic benefits of about 30 million yuan to the factory in 2021, and according to energy system industry standards, build a digital energy system, achieve comprehensive energy service platform, enterprise carbon management, energy big data application innovation platform, promote scientific management of energy saving and carbon reduction.