Fault transfer method and device for communication service of VoIP terminal

The invention discloses a fault transfer method and device for communication service of a VoIP terminal. The VoIP terminal directly forwards the communication request to the standby server when the main server registered by the VoIP terminal abnormally responds to the communication request, recovers the communication service when the standby server normally responds to the communication request, and sends a registration request to the standby server when the standby server abnormally responds to the communication request. If the standby server abnormally responds to the registration request, the standby server continues to forward the communication request to the next standby server until the communication service can be recovered on the currently inquired standby server or all the standby servers have been inquired, so that the communication service can be directly transferred to the standby server to run when the main server registered by the VoIP terminal crashes; and the method and the device are compatib