Service processing method, network device, and service processing system

The invention relates to a service processing method, network device and service processing system, wherein said method comprises that: based on the user information in received service request, judging if the frequency of service request is over preset value; if it is over, losing the service request; or else, sending service request; and the judgment comprises that: inquiring if there is control list relative to the user information and service content; if there is, based on control list, judging if the frequency of service request is over preset value; or else, based on user information and service content, building the control list of service request and sending service life. The invention can avoid user attacking server, avoid malice DDOS attacking server, to confirm normal operation and reduce cost.