Medical public opinion affairs have played a crucial role in social public opinions in recent years. By collecting and categorizing 80 medical public opinion affairs with great influence in 2012，this dissertation conducts an analysis on their whole characteristics，dissemination characteristics，and public opinions countermeasures. This dissertation also reveals that，the image building of the hospital lies heavily in its information release speed，information release channel，and its media coordination. Based on all those conclusions，this dissertation raises a series of countermeasures，including establishing hospital news spokesman system，perfecting the third party’s intermediation mechanism，attaching great importance to opinion leaders in medical field，releasing news with hierarchy and level for government and hospital，reporting medical public opinions objectively and impartially，as well as raising public’s media literacy and so on.