In this research the public’s perception of history was explored through data related to the ‘unification of the three countries’ of social media. The frequency of appearance of specific keywords in SNS data stored by social media users, audio data in YouTube videos, and comments and network structure were examined to examine users’ perception patterns. Depending on the purpose of use of social media, there was a big difference in the correlation between SNS data and keywords produced and consumed on YouTube. In spaces where friendship is mainly operated, such as blogs and cafes, the frequency of use of culture-friendly words is high, and students’ questions to solve history class tasks are high. On the other hand, there are channels on YouTube that uploaded content that reconstructed historical facts, but the distribution of videos containing the created ‘story’ that was enlarged and re-interpreted according to the purpose of the video was active.
In such videos, the frequency of historically inconsistent content or rude talk and abusive language toward a specific group was high, and a similar type of group dramatization could be confirmed in the corresponding comments.