"Affected by the Covid-19 epidemic, In more than 31 countries around the world, 510 million students will face school closures and adopt online learning methods in 2020. When the world is generally communicating through the Internet, a large number of news issues and false information Fake news continues to impact the international community through the spreading power of infinite bounds, and fake news has a considerable impact on epidemic prevention. According to the Swedish V-DEM research, Taiwan has the world’s highest level of disinformation attacks in the world. The 2020 digital news report released by the Reuters Institute of Journalism at the University of Oxford in the United Kingdom also shows that Taiwanese people’s trust in news continues to decline, with only 24 % Trust is related to the fact that Taiwanese people often come into contact with misinformation through mainstream media and social media. Fake news is distorted and deliberately distorted in the form of issues that attract people’s attention and affect perception. If people lack the skills to judge and think when receiving a large amount of media information, it may cause harm and influence. It can also be said that fake news is false through tradition. With social media impacting people’s lives, reliance on this distortion will increase the risk of people having a negative impact. If we cannot assess the credibility of the message, we will not be able to find the behind-the-scenes and motivational reasons. The proliferation of fake news has recently attracted attention to the topic of 'cognition' in Taiwan. The cognition theory of news literacy put forward by the scholar Porter in 2004 helps to directly pay attention to how people encounter a large amount of media information in daily life, how to make filtering decisions, and how to effectively combine the symbols in the information with the obtained information. The meanings are connected, and how they construct new meanings for themselves. This article will adopt the literature analysis method to explore the definition and current situation of fake news at home and abroad, media literacy, and analyze the scholar Porter’s cognitive theory of news literacy. It will provide the education community in Taiwan as an application and investigation for the promotion of Media literacy education. New perspectives and new horizons."