Abstract: Grain drying is a critical element in production chain and plays a key role in ensuring national food security．However, progress of drying industry toward high-quality development is hampered by outdated dying techniques that lack effective measures for carbon reduction and emissions．Starting from current status of mechanized grain drying technology, main reasons for high energy consumption in grain drying were analyzed from perspectives of heating methods in drying systems, drying process design, and drying control technology．The focus was on comparing mechanized drying technology with energy-saving improvement methods．Research and development process of drying theory and intelligent regulation was reviewed, characteristics and progress of intelligent technology for grain drying were discussed, and problems of information perception difficulties, poor algorithm accuracy, and single control strategy in intelligent grain drying were analyzed．Suggestions for future development of industry, including innovative research paradigms in grain drying theory, design and process optimization of drying equipment, and construction of an intelligent control method system for drying, have been proposed, providing reference for innovation of new technologies for energy conservation and emission reduction in grain drying and high-quality development of industry．