An intelligent car lamplight control device, comprising: an ambient light intensity sensor configured to automatically monitor a light intensity outside a car; a speed sensor configured to detect a driving speed of the car; a main control MCU configured to acquire a light intensity signal transmitted from the ambient light intensity sensor and a speed signal transmitted from the speed sensor, wherein when determining, by analysis, that a light intensity value in the light intensity signal is less than a preset value or is changed to be small from being large and then alternately changed between a large value and a small value, the main control MCU is configured to transmit a car lamp on-off control command to a lamplight main-control system through a wireless transmitter to control the lamplight main-control system to turn on a car lamp; wherein when acquiring that a speed value in the speed signal is greater than a preset value, the main control MCU is configured to transmit a high/low beam switching control command to the lamplight main-control system through the wireless transmitter to control the lamplight main-control system to switch a low beam to a high beam; characterized in that, when determining, by analysis, that the light intensity value is changed to be large from being small or is alternately changed between a large value and a small value and that an average driving speed is changed to be low from being high, the main control MCU is configured to transmit a high/low beam switching control command to the lamplight main-control system through the wireless transmitter to control the lamplight main-control system to switch the high beam to the low beam; and the intelligent car lamplight control device further comprises: the wireless transmitter configured to wirelessly transmit the control commands transmitted from the main control MCU to the lamplight main-control system; and the lamplight main-control system configured to receive the control commands transmitted from the wireless transmitter and to correspondingly control lamplight according to the control commands; wherein the main control MCU has an analog input terminal electrically connected to the ambient light intensity sensor as well as an 12C communication port electrically connected to the speed sensor, and the wireless transmitter is electrically connected to the main control MCU and is wirelessly connected to the lamplight main-control system. an ambient light intensity sensor configured to automatically monitor a light intensity outside a car; a speed sensor configured to detect a driving speed of the car; a main control MCU configured to acquire a light intensity signal transmitted from the ambient light intensity sensor and a speed signal transmitted from the speed sensor, wherein when determining, by analysis, that a light intensity value in the light intensity signal is less than a preset value or is changed to be small from being large and then alternately changed between a large value and a small value, the main control MCU is configured to transmit a car lamp on-off control command to a lamplight main-control system through a wireless transmitter to control the lamplight main-control system to turn on a car lamp; wherein when acquiring that a speed value in the speed signal is greater than a preset value, the main control MCU is configured to transmit a high/low beam switching control command to the lamplight main-control system through the wireless transmitter to control the lamplight main-control system to switch a low beam to a high beam; characterized in that, when determining, by analysis, that the light intensity value is changed to be large from being small or is alternately changed between a large value and a small value and that an average driving speed is changed to be low from being high, the main control MCU is configured to transmit a high/low beam switching control command to the lamplight main-control system through the wireless transmitter to control the lamplight main-control system to switch the high beam to the low beam; and the intelligent car lamplight control device further comprises: the wireless transmitter configured to wirelessly transmit the control commands transmitted from the main control MCU to the lamplight main-control system; and the lamplight main-control system configured to receive the control commands transmitted from the wireless transmitter and to correspondingly control lamplight according to the control commands; wherein the main control MCU has an analog input terminal electrically connected to the ambient light intensity sensor as well as an 12C communication port electrically connected to the speed sensor, and the wireless transmitter is electrically connected to the main control MCU and is wirelessly connected to the lamplight main-control system. the wireless transmitter configured to wirelessly transmit the control commands transmitted from the main control MCU to the lamplight main-control system; and the lamplight main-control system configured to receive the control commands transmitted from the wireless transmitter and to correspondingly control lamplight according to the control commands; wherein the main control MCU has an analog input terminal electrically connected to the ambient light intensity sensor as well as an 12C communication port electrically connected to the speed sensor, and the wireless transmitter is electrically connected to the main control MCU and is wirelessly connected to the lamplight main-control system.