. An automatically illumination control device of an elevator display screen having an elevator display screen; the display screen being installed with a driving circuit; the display screen having a microprocessor, a control circuit and at least one light sensor; wherein the elevator display screen is installed with an array of light emitting elements; characterized in that:
the light sensor is installed to the display screen for detecting environment light outside an elevator and then outputting signals about detected light intensity to the control circuit;
the control circuit comparing signals outputted from the light sensor and with default values and then transferring comparing results to the microprocessor; and
the microprocessor causes the display screen to change illumination of light according to the comparing result outputted to the display screen.