The invention discloses an intelligent street lamp system based on the internet of things technology. The system comprises a center processor, a display module, a voice prompt module, a detection boxand a street lamp device; the display module and the voice prompt module are both connected with the center processor, the street lamp device comprises a lamp rod, the tail end of the lamp rod axiallyextends to form a supporting plate, an LED lamp is arranged below the supporting plate, the detection box is arranged below the LED lamp, the detection box is arranged on the lamp rod, and is arranged below the LED lamp, a human body infrared sensor, an illumination intensity sensor, a sound sensor, a smoke sensor, a clock module, a GPRS positioning module and a micro processor are arranged in the detection box, and the human body infrared sensor, the illumination intensity sensor, the sound sensor, the smoke sensor, the clock module and the GPRS positioning module are electrically connectedwith the micro processor. Compared with the prior art, the intelligent detection device ensures road lighting at night, electric energy is saved, and the advantages of energy saving and environment friendliness are achieved.