Electronic data as criminal evidence was not provided in detail in the laws, which have became a problem to strike cyber crime. In view of the definition of data and electronic records of international convention, more and more countries paid attention on the legislation, as well as collected and stored electronic methods and ways. However, we did not legislate the evidence law to deal the cyber crime. Therefore, it is necessary to establish our country’s electronic evidence laws and learn from foreign country’s relevant legislation and international conventions.