In 2025, the discipline of Energy and Power Engineering & Engineering Thermophysics (formerly known as Engineering Thermophysics and Energy Utilization) of National Natural Science Foundation of China (NSFC) adjusted the application codes. Additionally, the discipline reviewed and updated the research directions and keywords under the new application code structure. Similar directions were merged; inappropriate directions were deleted; emerging directions were added, and keywords were also refined, which make the application code structure and revised research directions and keywords more comprehensive and reasonable. The connotation and extension of the discipline have been further clarified through this revision, which will facilitate the application and management of NSFC projects in the Energy and Power Engineering & Engineering Thermophysics discipline.