The present application is applicable to the field of display technology, and provides a display direction control method, a system and a mobile terminal. The display direction control method comprises the following steps: detecting a direction adjustment event for a focus window; determining a display direction of the focus window according to the direction adjustment event; the display directionof the underlying application corresponding to the focus window being adaptively adjusted according to the display direction of the focus window. The embodiments of that present application may be implement by detecting a directional adjustment event for a focus window, When a direction adjustment event is detected, Determines the display direction of the focus window based on the orientation adjustment event, The display direction of the bottom application corresponding to the focus window is adaptively adjusted according to the display direction of the focus window, so that the display direction of the focus window can be flexibly controlled, the bottom application can correspond to the display direction of the focus window, and the display effect and the user experience can be effectively improved.