Disclosed are a handover processing method, a network device, a terminal device, and a computer storage medium. The method comprises: when a first network device located in a first system network or a first core network is connected to a terminal device, the first network device establishes a candidate connection between the terminal device and a target system network or a target core network, wherein the candidate connection is used for handover to the target system network or the target core network when the terminal device meets a preset condition.