The utility model relates to the light emitting and illumination field, especially to a light-emitting device. An industrial servo sewing machine head lamp is connected to an operation panel or an electrical control unit and the operation panel is used for controlling the sewing machine head lamp completely, so that the light-emitting component only needs a few of basic LEDs. Main controller equipment directly controls the output current of the power supply of the light-emitting component installed at the operation panel; and with brightness control of the LED lamp group, functions of LED lamp group adjustment in multiple modes and brightness memory are realized. An LCD display module is used as one part of the operation panel function expansion and thus the function of real-time error reporting of the electrical control of the light-emitting device is realized.