The purpose of this study is to explore the impact of the use of new media on political trust and democratic evaluation. According to statistics in 2017, Taiwan’s broadband Internet population has been estimated to reach 18.79 million. In the past, the media was called "the fourth power" in textbooks to help people understand public issues and public opinions, and to play an important role in monitoring the government's checks and balances. However, with the increase in Internet usage, people have more access to information. Everyone on the Internet can be a reader of news, news, information, and can comment on political issues and accept comments from others. It can be said that the emergence of online media provides people with more opportunities to participate in politics. The focus of this paper is whether the public will have different judgments on political trust and democratic evaluation because of the preference for using traditional media or new media. Does the use of social networking sites have positive or negative effects on political trust and democratic evaluation? The social networking site is a representative product of new media. What is the impact of the use of social networking sites on political trust and judgment of democratic evaluation? The author uses cross-analysis, average number verification, binary odds logarithm model, linear regression model and related statistical charts to analyze the 2014 Taiwan Social Change Survey. The study found that people's media preferences and whether they use new media have less influence on political trust and democratic evaluation than expected in this article. However, in political party identification, both political trust and democratic evaluation have reached statistically significant levels. In short, the public's judgment on political attitudes can be said to be minimally influenced by the new media, and ultimately it is back to the party's identity as the basis for judging. Therefore, the author suggests that in the future related research, in addition to the political party identity as a self-change influencing political attitudes, and in the use of the use of new media as an intermediary variable impact on political attitudes. Through the tendency of political party identification, it is tested whether new media has an enhanced effect. If statistically significant results are found, we can try to infer the influence of new media.