This study intend to examine the web-groups which are worked by CMC(Computer Media Communication), if these particular groups of web which make up the web-discussed area and opinion space are affected by the traditional primary media or the web-group could constructed the agenda and transmit information by themselves and become an alternative communication-space. This study attempt to research the similarity or the difference between the primary media which report and arrange the social important agenda and the web-group(BBS) which construct the agenda in the web-opinion area . In other words, the study tries to understand the primary media and the alternative media are supplementing each other or far away.