This study tries to facilitate Twitter as a typical representative of social media to discover the role and influence that social media played during the Syrian refugee crisis. We use Twitter data to discover the role of social media on information diffusion and further influence of social media on political engagement and the policy making process. We observe the tendency of the number of tweets before and after the breaking news to see the changes in public attention by exploring the content of top tweets for recognizing the timeline of actions and policies after the breaking news. Moreover, we explore the repost network of an influential node to visualize the dissemination of information during the crisis period. Lastly, we also analyze hashtags and lexical diversity of a sample dataset for understanding public participation in this event. In 2015, the breaking news on a Syrian three-year-dead boy spread through social media creating worldwide attention to the Syrian refugee crisis. Faced with the subsequent fierce humanitarian discussion on social media, some countries which held negative attitudes to Syrian refugee settlement before changed their attitude and issued a new policy to accept and provide aid to Syrian refugees. There hasn’t been any research in exploring the influence of social media on the Syrian refugee crisis. We are increasingly moving towards highly interconnected and interdependent societal systems where social media plays an important role in supporting the flow of information by connecting local information to a global level in a timely manner. The results indicate that social media with close interaction, rapid transmission and easy accessibility has strong power on the exposure and dissemination of emergency events, which played an important role in reshaping policy towards the Syrian refugee crisis. It therefore can suggest that the public can make use of social media to collectively voice therefore concerns which can be instrumental in influencing the policy through online collective action and community coordination.