A mobile device, comprising: a direction sensor, a signal processing unit and a directional antenna unit, wherein the direction sensor is configured to detect a current movement direction of the mobile device; the signal processing unit is configured to determine an antenna adjustment direction of the directional antenna unit according to the current movement direction, wherein the antenna adjustment direction is related to the current movement direction; the directional antenna unit is configured to transmit electromagnetic waves for communication of the mobile device and is configured to adjust an antenna direction of the mobile device from a first direction to a second direction according to the antenna adjustment direction such that a strength of electromagnetic waves transmitted by the directional antenna unit in the second direction is greater than that of the electromagnetic waves transmitted in the first direction; characterized in that: the signal processing unit further comprises a signal detecting unit, the signal detecting unit is configured to detect signals from a signal cell in the current movement direction and to determine a signal strength of the signal cell when detecting the signals from the signal cell in the current movement direction, when the signals from the signal cell in the current movement direction are detected and the signal strength is greater than a preset strength threshold, the signal processing unit is configured to send an antenna adjustment instruction to the directional antenna unit that adjusts the antenna direction of the mobile device from the first direction to the second direction according to the antenna adjustment instruction and the antenna adjustment direction. wherein the direction sensor is configured to detect a current movement direction of the mobile device; the signal processing unit is configured to determine an antenna adjustment direction of the directional antenna unit according to the current movement direction, wherein the antenna adjustment direction is related to the current movement direction; the directional antenna unit is configured to transmit electromagnetic waves for communication of the mobile device and is configured to adjust an antenna direction of the mobile device from a first direction to a second direction according to the antenna adjustment direction such that a strength of electromagnetic waves transmitted by the directional antenna unit in the second direction is greater than that of the electromagnetic waves transmitted in the first direction; the signal processing unit further comprises a signal detecting unit, the signal detecting unit is configured to detect signals from a signal cell in the current movement direction and to determine a signal strength of the signal cell when detecting the signals from the signal cell in the current movement direction, when the signals from the signal cell in the current movement direction are detected and the signal strength is greater than a preset strength threshold, the signal processing unit is configured to send an antenna adjustment instruction to the directional antenna unit that adjusts the antenna direction of the mobile device from the first direction to the second direction according to the antenna adjustment instruction and the antenna adjustment direction.