Abstract: Mammography, CT, MRI, ultrasound, PET and so on are the major imaging examining methods in the diagnosis of breast tumors. In this review, recent literatures were reviewed and a comparence was made.Then we found that every method had its advantage as well as its disadvantage, so clinic shoud select proper methords according different breast diseases, and breast imaging shound chang from one method to many methods applied together and from diagnosis to diagnosis and therapy applied together.