With the booming development of internet,the computer has brought us the greatest convenience than ever before and make the mankind’s lives easier.However,every coin has two sides.Computer crime has also become a social problem that cannot be ignored.There are many forms of computer crimes,such as online gamble,obscene movies,theft and attacks by hackers,internet fraud and so on.These crimes caused huge loss to people’s property and health. Those who are addicted into the gamble,not only lose every penny earned in the past but also lose love from their family.Divorce is inevitable in the end.Obscene movies,as a kind of spirit drug,have brought health damage to many young people and lead them to actual crimes such as rape and robbery even murder. In order to strike the computer crimes,the laws should be made by our nation to return severe penalty to those who open online gambling club,post blue films and internet thieves.And those who disclose the computer crimes should be rewarded.