According to this survey results, middle and high school students are writing more active out of school than in of school and were more likely to use internet than print. Low level on writing interest in school hold a majoriy of the students and boys are less likely to like writing in school than girls. The fact that Internet is the most common tool of writing demands us to do new understanding on writing context, purpose and process. Unlike girl, boys are writting with the purpose of information sharing on Internet message boards. Unlike boy, girls keep a journal of daily events and write with the purpose of relational maintenance on friens’s web blog. The results that killing time has been decreasing and express themselves has been increasing with advancing years on reason of writing allow us know the distinct writing features of adolescents that forming and expressing self-identity through their writing.