This report focuses on the youth group （ from 18 years old to 34 years old）'s internet participation. Based on multiple data sources and using “instrumental-sentimental”internet participation as analysis framework，this paper tries to highlight the obvious characteristics of youth lifestyle，examine how the youth construct their daily life and social interaction through internet and public participation and cultural participation on the internet. The research has generally shown the empowering function of internet in youth's personal life and public life. One aspect is the instrumental empowerment，the youth could acquire various information through social network and internet，hence they could acquire more opportunities and choices in the process of everyday life，social interaction，employment and participation in public life. The other aspect is the sentimental and authoritative empowerment，the youth could establish new social field and cultural field through internet，hence they could shape their particular mode of social interaction and cultural pattern，and express their own appeals. The group of college students's level of public participation is relatively higher. However，the internet and social network have some complexity and risk，they could exert some influence on youth. The government，internet platform and youth should make joint efforts to improve the internet safety environment and construct the positive and healthy internet lifestyle.