A control method for a mobile terminal, comprising: receiving, by a control device for the mobile terminal, a first switching instruction which instructs switching the mobile terminal to a security mode; and performing, by the control device for the mobile terminal, control processing on the mobile terminal according to the first switching instruction to switch the mobile terminal to the security mode, so as to disable the mobile terminal to transmit service data to a base station, wherein performing, by the control device for the mobile terminal, control processing on the mobile terminal according to the first switching instruction comprises: disabling, by the control device for the mobile terminal, an uplink service channel of the mobile terminal; and the control method further comprises: after disabling, by the control device for the mobile terminal, the uplink service channel of the mobile terminal, prompting, by the control device for the mobile terminal, a user whether to switch the mobile terminal from the security mode to a normal mode when the mobile terminal receives an external signal from downlink service data of the base station; characterized in that performing, by the control device for the mobile terminal, control processing on the mobile terminal according to the first switching instruction further comprises: before transmitting, by the mobile terminal, the service data to the base station, interrupting, by the control device for the mobile terminal, a step of a series of processing, performed by the mobile terminal, on the service data. receiving, by a control device for the mobile terminal, a first switching instruction which instructs switching the mobile terminal to a security mode; and performing, by the control device for the mobile terminal, control processing on the mobile terminal according to the first switching instruction to switch the mobile terminal to the security mode, so as to disable the mobile terminal to transmit service data to a base station, wherein performing, by the control device for the mobile terminal, control processing on the mobile terminal according to the first switching instruction comprises: disabling, by the control device for the mobile terminal, an uplink service channel of the mobile terminal; and the control method further comprises: after disabling, by the control device for the mobile terminal, the uplink service channel of the mobile terminal, prompting, by the control device for the mobile terminal, a user whether to switch the mobile terminal from the security mode to a normal mode when the mobile terminal receives an external signal from downlink service data of the base station; characterized in that performing, by the control device for the mobile terminal, control processing on the mobile terminal according to the first switching instruction further comprises: before transmitting, by the mobile terminal, the service data to the base station, interrupting, by the control device for the mobile terminal, a step of a series of processing, performed by the mobile terminal, on the service data. disabling, by the control device for the mobile terminal, an uplink service channel of the mobile terminal; and the control method further comprises: after disabling, by the control device for the mobile terminal, the uplink service channel of the mobile terminal, prompting, by the control device for the mobile terminal, a user whether to switch the mobile terminal from the security mode to a normal mode when the mobile terminal receives an external signal from downlink service data of the base station; characterized in that performing, by the control device for the mobile terminal, control processing on the mobile terminal according to the first switching instruction further comprises: before transmitting, by the mobile terminal, the service data to the base station, interrupting, by the control device for the mobile terminal, a step of a series of processing, performed by the mobile terminal, on the service data. after disabling, by the control device for the mobile terminal, the uplink service channel of the mobile terminal, prompting, by the control device for the mobile terminal, a user whether to switch the mobile terminal from the security mode to a normal mode when the mobile terminal receives an external signal from downlink service data of the base station; characterized in that performing, by the control device for the mobile terminal, control processing on the mobile terminal according to the first switching instruction further comprises: before transmitting, by the mobile terminal, the service data to the base station, interrupting, by the control device for the mobile terminal, a step of a series of processing, performed by the mobile terminal, on the service data.