By watching short films from Screening Surveillance. We can see the impact of the current epidemic of big data on our lives. With the rapid development of online media, our lives are being monitored unintentionally. This kind of surveillance behavior makes many people feel that their privacy is exposed, but at the same time, some people feel that it has brought great convenience to their lives. Surveillance of network media breaks through the traditional definition of surveillance. It’s not customs clearance to install cameras, bugs to learn about people’s lives. Big data is to infer your preferences, spending power, etc. based on the website content you browse, the social media people you follow, etc. Therefore, the personal information stolen by big data is unknowable. Sadly, with the growing popularity of social media, people cannot avoid and get rid of their tracking by big data. It remains to be seen how much this prevalence of big data will affect people’s lives.