The electronic evidence is different from other evidences;therefore the evidence collection of computer-related crime is also different from the traditional crime.

Design and Realization of the Forensics Search System of Computer Crimes;

On the Person Who are Relatively Responsible for Crimes Should not be the Subject of the Computer Crime;

After a dozen of year s development,computer forensic technology,as a special one,has become one of the most important ways in which public security departments find and gather evidence,and it has been used extensively to solve computer crimes and accidents.

There exist security problems due to the openness of computer system and the weakness of computer itself, which leads to many computer crimes.

While meeting the arrival of informational society, people find computer crimes have been increased sharply, which not only bring great economic damage to the victims but destroy the economic order of the society and threaten every country s national security and social cultures.

The new concept of crime scene should be: crime scene refers to the environment caused by the changes of crime activities and the carriers of crime evidence and information of crime activities.