This article takes minority groups as examples, to review the practice of the 'public sphere' in the net. The author uses literature review, website observation, in-depth interview to collect data. This article aims to understand the discourse of minority group websites, the discrepancy of the net and the mass media, the facilitation of the net for minority groups. By observing the dialogue principle of the public sphere in the net, we concluded the special features of the net could practice the public sphere spirit.