With the cyber environment getting more mature gradually, the advancement of technologies and techniques, the net users increasing, and the rapid development of the peripheral digital products, the net has evolved into a new generation that emphasizes on users co-constructing the cyber contents¡XWeb2.0. Up to now, quite few research essays talk about this field in Taiwan, so it lacks an applicable analytical structure to help the related industries develop the business. In view of this, this research will focus on constructing an analytical model for Web2.0 cyber sites through making a systematic analysis on references, to talk about the business models of Web2.0 cyber sites in Taiwan. Further, we can learn the way how these cyber sites run their businesses and also realize the identity and difference. This research essay will take the method of case study. Through the comparison among diverse cases, this study may find the identity and difference among these varied business models, even to enhance the effectiveness and efficiency of this analytical structure, which both might be beneficial to the industry development and also help the analytical structure set up. According to Web2.0¡¦s three main characteristics¡Xuser involvement, openness, network effect, also accompanied with segmentation strategy, product strategy, service strategy, technique strategy, profit model, this study builds ¡§UCCT Model¡¨ which comprises four key factors to run business of Web2.0 cyber sites¡Xuser, content, community, and tool. This study further indicates that we could analyze the business model of Web2.0 cyber sites through UCCT Model; even, we could try to figure out what different Web2.0 cyber sites look upon greatly. This study found that UCCT Model could effectively narrate the business model of Web2.0 cyber sites. Through the comparison among cases by case studying with UCCT Model, this study found the business model of Web2.0 cyber sites have the following attribute. First, users play the role of the producer and also the consumer. Second, sharing fails to be the main purpose for users. Third, abundant and various contents could make websites be main databases. Fourth, websites could enrich users¡¦ experiences to enhance their involvement. Fifth, websites could fortify the stickiness with community relationship. Finally, the profit model would be divided into three categories¡Xthe content one, the community one, and the tool one.