中文摘要：

事件意义及事件体验是事件研究的核心所在。文章基于个人建构理论,以2011西安世界园艺博览会为例,从网友许愿的角度来探讨重大事件的意义结构。采用ROSTWordParser软件对网友在开幕前和开幕后的许愿辞进行内容分析和对比研究,比较开幕前后网友对世园会的不同希望和感受,剖析网友许愿辞的话语意义,阐释许愿辞与重大事件的联系,在此基础上构建一个两维三结构的重大事件意义体系框架。对网友在开幕前后的许愿辞进行对比分析发现：（1）网友在开幕前后均对重大事件举办地给予了较高的关注;（2）网友在开幕后更加强烈地表达个人对家庭的爱或履行其家庭责任;（3）开幕前,网友侧重于体现出＂主人＂的自我形象,网友在开幕后更多体现的则是＂客人＂的自我形象,也更明显地感知到重大事件与个人的利益联系。

英文摘要：

Mega-event, such as Olympics and World Expo, has significant impacts on individuals and the host destination, which has been the hot topic in event management area. The increasing prevalence of Internet provides an avenue for the public to express their feelings, wishes, and understandings, even complaints, associated toward the mega-event online, which are reflected as one impact of the event on them. This research attempts to explore such impacts by using the Internet Users＇ （IUs＇） Wishing Sentences （WSs） on the ＂Wishing Wall＂ Sub Site of International Horticultural Exposition, 2011, Xi＇ an （ Expo 2011 Xi＇ an China） official website. Based on the Personal Construct Theory, the present study employs the ROST WordParser software to analyze 1527 WSs before the opening and 866 WSs after the opening. The content analysis results in 50 high frequency Wishing Words （WWs） , which could be grouped into six categories,including the event itself, the event＇ s scale and impacts, the event＇s subject, people-self, place, and people-others. According to the relationship between the categories and the different perceived objects, the paper proposes a conceptual model of mega-event＇ s impacts on Chinese internet users manifested on their online postings. The model includes two dimensions and three layers of group connections. The two dimensions refer to theme-content and scale-level;the three layers of connections include people/self-the event- place, people/self- the event- people/others structure, and people/self- the event structure. The study also finds that the IUs online postings on the Expo 2011 could be differentiated by geographical locations, consanguinity, and kinship tendency. They strongly link themselves to the host destination, the family, as well as the event itself. Comparative analysis of the WWs before and after the Expo 2011 opening shows that： （ 1 ） IUs provided the same level of concerns with the host place before and after the opening ; （2） after the opening the