Street lamp time and brightness controller and street lamp time and brightness control method

The invention discloses a street lamp time and brightness controller and a street lamp time and brightness control method. The street lamp time and brightness controller comprises a brightness sensor circuit, a real-time clock circuit, a microcontroller, a liquid crystal display, a control interface and a button keyboard, wherein the brightness sensor circuit, the real-time clock circuit, the liquid crystal display, the control interface and the button keyboard are connected with the microcontroller. According to the street lamp time and brightness controller and the street lamp time and brightness control method, the state of a brightness sensor can be automatically diagnosed, a street lamp is controlled according to the sunrise and sunset time if the brightness sensor fails, and accordingly the opening time of the street lamp is furthest reduced, the power is saved, and the service life of the lamp is extended.