A survey indicates that the number of fraud-related crimes has been increasing considerably throughout the country. In addition, the number of online shopping fraud has been becoming much more than before since 2005. Up to 2009, the number of crimes associated with online shopping fraud has increased to roughly 7114 cases, leading to the percentage as 18.08% of all the fraud-related crimes. Even though the number of fraud-related crimes has been decreasing for the past-three-year period from 2006 to 2009, the crime number of online shopping fraud has been increasing gradually instead. Because the situation of Internet-based swindle is becoming progressively worse, such a fraud-related crime is worth much more attention from authorities concerned and much more effective measures taken by administrators so as to alleviate the number of online swindling crimes. Consumers throughout the country are getting used to make purchases by means of the application of Internet, which has made it possible for consumers to be trapped in online shopping fraud in such a tremendous electronic market. In addition, not only is the generation of online shopping fraud associated with the whole situation, but it is also related to online shoppers and individual traits. Consumer¡¦s involvement in Internet is of great significance to all the factors resulting in online shopping fraud. Based on the Involvement Figure developed by Zaichko wsky in 1985, this study aims to measure Internet-based consumer behavior, to examine the correlation between Consumer¡¦s Involvement in Internet and Purchasing Behavior, and to observe the result of online shopping fraud. This study adopts the participants consisting of the victims suffering from fraud-related crimes in Kaohsiung County, and collects the data by means of the distribution of 310 questionnaires, of which the number of valid questionnaire is up to 260. In addition, this study utilizes SPSS 12.0 to proceed data analysis. Results released by this study indicate as below: 1. In terms of the dimension, Internet Involvement, applied in the questionnaire, consumers recruited in this study belong to medium-degree and high-degree groups. The highest of each dimension is the rationality of Internet. Individual¡¦s internet involvement is obviously correlated to his or her age, education background, occupation and the recognition to 165 fraud-prevention hotline. 2. In terms of the dimension, Purchasing Search, applied in the questionnaire, individuals hired in this study belong to the medium-degree and high-degree groups. The highest of each dimension is the application of purchase. Consumer¡¦s purchasing search is prominently correlated to his or her age, education background, occupation and the recognition to 165 fraud-prevention hotline. 3. Consumer¡¦s Internet Involvement and each dimension are correlated to each other, and so are Purchasing Search and each dimension. Internet Involvement is correlated to consumer¡¦s Purchasing Search in a positive way. 4. In accordance with the above conclusions blended with online shopping fraud survey and researcher¡¦s practical experiences, this study has made it available to submit suggestions in four different aspects including the government organizations, the private corporations, individual tendency to Internet, further researches.