Today, the Internet has become an indispensable part of modern life. Besides the benefits it brings, there are many harms that no one wants. First, the Internet can place heavy pressures on family and social relationships. If users are addicted to the Internet, they will tend to isolate themselves from the real world and immerse themselves in a virtual world. The consequence of this is that there is nothing more interesting than the Internet for them. Next, the Internet also has a huge influence on work efficiency. Taking students as an example, in class, they often think about video games and movies rather than listening to what their teacher is saying. This will seriously affect the quality of learning. Not stopping there, dependence on the Internet can be a big obstacle to people's creative development. Instead of thinking independently, many people take advantage of the rich source of information online to complete their tasks as soon as possible. Moreover, some social networking sites contain unpredictable risks, because they are not strictly controlled. Some websites report reactionary, untrue news, some websites even take advantage of users' gullibility to make illegal money. Last but not least, the Internet has a bad influence on to health. There is no denying the fact that it impairs our eyesight. In addition, it leaves sequelae in some diseases of memory, bones and joints, etc., especially promoting the aging process to take place faster. The internet is not bad, but you should consider using it rationally and effectively.