The advent of human infections with avian influenza A（H7N9）and the emerging communicable disease has brought us profound thoughts on lemology teaching recently. We analyzed the exiting challenges of lemology teaching， including great changes in communicable diseases com-posing but limited class hours， decreasing of communicable diseases cases， medical students' psycho-logical apprehension， lack of teachers， more and more requirements in the prevention and treatment for communicable diseases from the public， etc. Several suggestions on how to further improve the lemology teaching quality were proposed including adjusting the curriculum arrangement， paing atten-tion to accumulate teaching cases， applying multi-media materials， taking full advantage of the teach-ing cases from specialized hospital， teaching students knowledge about themselves protection， improv-ing the quality of young teachers， emphasizing discipline characteristics and the importance of public health， reforming the teaching method and promoting the effect of teaching in communicable diseases.