Caffeine is a natural bioactive ingredient commonly found in plants such as coffee， tea and cocoa. It has been widely used in food globally for many years as functional supplement. Proper intake of caffeine can help healthy individuals improve their attention， exercise ability， and relieve their fatigue. Domestic and abroad food safety regulating administration agree that caffeine intake in daily diet is safe， but attention should be paid on individual differences， caffeine intake and frequency. Many countries and regions have established strict application limits and labeling requirements for caffeine application in food. In order to further enhance the public's scientific understanding of caffeine， eliminate the prejudice against caffeine， and promote the proper application of caffeine in related food industries， the Chinese Institute of Food Science and Technology organized experts in food science， public health， food safety and food nutrition， and representatives of related industries， to form a scientific consensus on caffeine， through consultation， literature retrieval and specialized workshop， so as to promote the proper use of caffeine in China.