Abstract Ju [Research on personal characteristics, the behavior of using Internet and Internet addiction for Taiwanese college study. Master thesis. Taiwan, 2000] found the Internet function was related to the severity of Internet addiction, and this study explored the relationship between the Internet function and the Internet addictive behavior. Seventy-six college students were included in this study and had completed the Internet use function questionnaire (social function, informational function, leisure function and the virtual emotional function) and the Chinese Internet Addiction Scale (compulsive use, withdrawal, tolerance, time management problem and interpersonal and health problems). The study revealed not only the relationship between the social function and the index of the Internet dependence (compulsive use, withdrawal, tolerance and the problems in the interpersonal relationship and health), but also the correlation between the information function and the index of the Internet abuse (the problems in the interpersonal relationship and health). We found the social function played the core role in the Internet addictive behavior and the mechanism needs further discussion.