Introduced the teaching of medical informatics at home and abroad, analyzed the significance of medical informatics studied in medical colleges, discussed the content of medical informatics that should teach, and the problem should pay attention to. Medical informatics is an interdisciplinary science of the information technology and medical science. Information technology (IT) is drawing more attention to medical institutes and is used extensively. It has become increasingly popular to utilize IT providing a better service to hospital, the patient science and research, and education. Therefore, extensive medical informatics teaching has become a necessity among medical students.