A mobile device, including: a direction sensor, a signal processing unit and a directional antenna unit, said direction sensor being configured to detect a current movement direction of said mobile device; said signal processing unit being configured to determine an antenna adjustment direction of said directional antenna unit according to said current movement direction, said antenna adjustment direction being related to said current movement direction; and said directional antenna unit being configured to adjust the antenna direction from a first direction to a second direction according to said antenna adjustment direction.