Power consumption management method, device and system

The invention relates to a power consumption management method, device and system, relating to the field of a power system. The power consumption management method comprises the following steps of receiving generation power information sent from a power generation output device by a background server; receiving consumption power information sent from a power consumption output device by the background server; judging whether the generation power information is conform to the consumption power information or not; sending an output power adjustment signal to the power generation output device to make the generation power information conform to the consumption power information if the generation power information is not conform to the consumption power information. By the power consumption management method, real-time balance of power generation and power consumption can be reached, the situation that the generation power is larger than the consumption power is prevented, energy is saved, the environment is protected, meanwhile, the situation that the generation power is smaller than the consumption power is also avoided, normal power consumption demand of people is met, and more convenience is brought to a user.