The invention provides a cloud computing energy management system and method based on green energy resources. The system comprises an energy acquisition module, a node priority level setting module, a node energy supply condition setting module, a node electricity consumption predicating module, an electricity distribution processing module, a node energy supply control module and an energy storage module. The energy acquisition module, the node priority level setting module, the node energy supply condition setting module and the node energy consumption predicating module are connected with the electricity distribution processing module. The electricity distribution processing module is connected with the node power supply control module and the energy storage module. By means of the cloud computing energy management system and method, the green energy resources can be managed dynamically in real time for the instability of the green resources, the energy resources can be fully utilized reasonably, and the energy resource utilization rate is increased; meanwhile, energy consumption caused by a last-dispersion first-concentration electricity distribution mode required by a traditional power grid is lowered, and electricity waste is reduced.