Switching method, apparatus and system for mobile communications

The invention embodiment discloses a switch method in mobile communication, which comprises that: user equipment judges whether the switch is required according to the switch command carrying source district identifier and target district identifier sent by RNC; if the switch is required, the user equipment finishes switch according to the switch command sent by the RNC and stores the identifier of the current district of the user equipment and the source district identifier in the switch command; otherwise, the user equipment judges whether the source district identifier in the switch command is identical to that of the stored source district identifier; when the two identifiers are identical, the user equipment feedbacks a switch complete message corresponding to the switch command to the RNC. The invention embodiment further discloses a switch device in mobile communication. With the method and the device, unnecessary switch failure process between the RNC and UE can be voided, thereby improving switch success rate and solving the problem of unnecessary repeated switch failure.