Because the endorsement of the scientific knowledge system and the missions of rescuing human life, medicine as a discipline has a preceding status in our society and physicians become the instructors for our healthy lives. The creation of this eminent image can both be attributed to the development of medical knowledge and physicians as the hero combating against diseases described by medical historians. However, this image may cause the so-called "unhistorical projection" and lead to a misreading of the historical context. Based on the historical sources "Prognostic" and "Epidemics" in the Hippocratic Corpus, this paper attempts to treat ancient doctors as medical craftsmen and suggest another image different from modern physicians - an itinerant craftsman.