The invention relates to a smart street lamp power consumption real-time control system. The smart street lamp power consumption real-time control system comprises a plurality of street lamps. The plurality of street lamps are divided into a plurality of area groups according to physical locations, and each area group is configured with a street lamp control subsystem, an external power supply subsystem and a solar power supply subsystem. The street lamp control subsystem comprises a branch power supply circuit and a main power supply circuit, each street lamp is respectively provided with a branch power supply circuit, the branch power supply circuit is provided with an independent storage battery, and the independent storage battery provides electric energy for the street lamp through the branch power supply circuit. The main power supply circuit comprises a plurality of power supply branches and a main storage battery, each power supply branch is arranged corresponding to the streetlamp, the main storage battery is powered by the street lamp on the power supply branch, and each power supply branch is provided with a switching unit. The illumination power of the street lamp canbe controlled according to the electric quantity of the street lamp, thereby ensuring the illuminance of a road while the power is balanced, and the decrease in the illuminance is compensated throughthe street lamps with more electricity to ensure that the illuminance of the road does not affect the driving.