The invention provides a factory load control system and method based on plan management. By establishing a factory load control system comprising a load management unit, a user plan management unit,a data acquisition unit, an equipment control unit and an equipment unit, user load resources are decomposed in a standardized manner, demand response resources of a factory are integrated, sequentialcombination is performed, and a demand response plan is generated. By starting from the characteristics of the factory load, the factory load control system and method provide the load control methodbased on the plan, the integration and optimal configuration of complex load resources of the factory are achieved, the peak clipping and valley filling effects are improved, and the reliability of the power grid is enhanced.