The Street journalism is the other name of Web 2.0 media. Media have had being a pivotal role in protest against mad cow. We can see the power of the media through this issue. First of all, the media makes it possible for a host of people to take part in the protest voluntarily on basis of internet. The people discuss the problem and provide their information on the internet. By sharing the information, many people can access the reality of the protest and are drawn to the protest having their own will. Second, there are lots of reporters in media. Many people are making kind of media such as videos, and photos. They upload the scene of protest, and let people get the information with just one click of the mouse. A host of media are made, the effect of a number of media is also enormous. That is the reason why Web 2.0 media is known as the Street journalism. In conclusion, media makes people produce, share, and consume the information in Korea. Clay Shirky also says that fact. We need to recognize the power of the media.