The main disadvantages are: some of the young people are too obsessed with the network control poor, it will trap into the network. Relevant data show that young people indulge in network performance is more than 89 percent plummet. Online games will have a strong young vanity has led to some young people have an unhealthy psychological, severely hampered the normal development of young people. There are fighting games so that some young people think that real life can be like a virtual network of the world as ruled by the law of the jungle to the world today, leading toward the path of crime. Play the role of those villains, so that boys like girls change, but it's like boys girls. The trap of the second network, some people because of social discontent, the network's own desire to radiation, leading to others on the network by fraud, deceived many examples, list goes on.Many benefits, save time and effort before the provincial lesson entirely on hand-written, time-consuming and laborious, much more will have to modify. Preparation of a computer is now "semi-automatic", and the school to teach all the prior knowledge input into the computer, after layout, modify, save, and finally print it out; the same can also copy the link. Computer is time-saving, labor-saving good helper, it gives me more time to study materials, the design of better teaching methods.