Teenagers have become the main internet user group. Since teenagers are in a critical period in which their world and life outlooks are being shaped，they are particularly susceptible to external influence. While the internet has played a positive role in the growth of teenagers，it has also，with its inductive and negative information，posed a number of problems to their internet use. Therefore，how to build a healthy internet environment and guide the teenagers’ behavior in their use of the internet，has aroused wide-spread attention from scholarship. This study largely focuses on the research on teenagers and their internet use，namely the legislation in minors’ internet use，internet ethics，internet addiction and internet crimes，in relationship to its prospects.