One of the most serious cyber-crimes is cyber-bullying taking an advantage of anonymity on line. We can find inherent suppressed cravings to blame others within us happen on line. Some people call others the names in a cyber-place which can’t pose responsibility because of it anonymity. But I am sure that they will fathom that blaming others for fun is not good for both parties, stopping their cyber-bullying. Another cyber crime is to hacking others' information. We who’re getting used to cyber system are more likely to do through cyber space. For example, we do internet banking, or daily routines through smartphone. We almost can’t live without internet or smartphone, which means that our information or money can be more susceptible for hacking. Therefore, we have to take some countermeasures preemptively against cyber hacking. First, we need to pay attention to cyber expert , second, we need to keep alert at cyber hacking through studying relevant information with many materials.