Autofluorescence bronchoscopy(AFB)is a new type of bronchoscope useing an special equipment to motivate and identify fluorescence of cells,and then developed by a computer image analysis technology.At present,it has been used extensively in clinical.For example,the early diagnosis of lung cancer,selecting an appropriate therapy before operation,detecting tumor recurrence after operation,and screening in high-risk group.Now the paper make a review about the value of AFB in these field.