The present disclosure relates to a method and a device for displaying time on a mobile device. The method includes detecting a first preset operation for displaying device time when a screen of the mobile device is off; computing the device time via a touch chip; sending the device time from the touch chip to a display driver chip, wherein the touch chip is configured to acquire standard time when an application processor is in a sleep state and to compute the device time based on an internal clock; activating the screen; and displaying the device time on the screen via the display driver chip.