A cybercrime detecting and preventing method and system includes a website, an interface dynamic web page, a search program, and a database. When a network user inputs a "telephone number code" and "authorization code" of a network server using an internet accessing device, the user is also required to input a "source identification code." When access to a network receiver or server is requested, a "telephone number code and authorization code" set is input to the website for comparison with "telephone number codes" and "authorization codes" stored in the database. If the input "telephone number code and authorization code" set does not match the stored "telephone number code and authorization code" set, the "source identification code" is transmitted to a computer to be analyzed and determine the location of the cybercriminal and relay information on the cybercrime to an appropriate public security organization.
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