舆情的监测是公共管理部门不可或缺的监测和管理手段[1-3]。浙江省疾病预防控制中心从2009年起在以往信息检索基础上开展舆情监测工作,对公共卫生相关的媒体和互联网信息,特别是对社会和公众热点和焦点问题进行舆情监测,为疾病预防控制工作提供决策和管理参考。2013年3月下旬,浙江和部分省市出现人感染H7N9禽流感疫情,引起国内、国际的普遍关注,公众反响日益强烈。为了提供专项舆情,进 Public opinion monitoring is an indispensable means of public administration monitoring and management [1-3]. Since 2009, Zhejiang Provincial Center for Disease Control and Prevention has conducted public opinion monitoring on the basis of previous information retrieval, conducted public opinion monitoring on public health related media and Internet information, especially on social and public hot spots and key issues, and has provided support to disease prevention and control work Provide decision-making and management reference. In late March 2013, the outbreak of human infection of H7N9 bird flu occurred in Zhejiang and some provinces and cities, arousing widespread public concern at home and abroad, and the public response was intensified. In order to provide special public opinion, into