Abstract- Web-Based question answering services facilitate users to seek more personalizeed health-related information. However, the users sometimes have to wait for a while until their questions to be answered , Automatic questins answering researcg can assist the system to generate of rerieve the answer to users. Our work was a pioneering study on consumer-health question, which corresponds to medical specialization. Question sub-topic classification is completed by two complementary approaches: dictionary-based and machine learning based.