In the age of technology, the Internet is a useful and necessary tool for human life. However, in addition to the undeniable benefits, we should also be cautious with the negative and the risks that come from the Internet. The negative aspects of the Internet are likely to appear largely due to the carelessness of users. There are many subjective people in the disclosure and sharing of personal information widely. This contributes to the attack and illegal exploitation of information of cyber criminals. We should only be friends with people we really know in real life, and keeping up with our status as well as our location is also not recommended. In addition, the Internet also has real effects if we spend too much time on it. There are many people who are willing to give up work, friends and even family because of Internet addiction, and now there are many cases where medical and psychological interventions are needed to get some people out of that kind of addiction. The strong development of social networking also makes our real life relationships become more difficult to maintain, and many people are not even able to communicate well with friends in person. Sitting too long in front of a computer screen or phone also causes physical injuries and bad influence on our eyes, neck or spine. The internet is not bad, and most of negative things are caused by the neglect of users. We should consider Internet as a useful tool, not a thing that can control us.