Our daily life is inseparable from the Internet. Online seems to be a peaceful scene, which is far from the ferocious face of criminals in reality. But it is these characteristics of cyber crime that make us relax our vigilance against cyber security. Criminals on the internet don't have to be close to the scene, and their illegal and criminal acts are difficult to be found by ordinary netizens, so training in network security is very necessary. To curb cyber crime, we should start with software and hardware, and then train employees in cyber security to enhance their awareness of cyber security.