The invention provides equipment and method for energy-saving dispatching of a virtual data center. The method includes: acquiring energy consumption data and system information of each physical node of the data center, obtaining a mapping relation between energy consumption and usage rate of each energy consumption device in each physical node according to the energy consumption data and the system information of each physical node, generating an energy-saving dispatching algorithm according to the mapping relation between the energy consumption and the usage rate of each energy consumption device in each physical node and available resources of virtual machines deployed on each physical node, and migrating the virtual machines on the physical node according to the algorithm to reduce total energy consumption of the data center. The mapping relation is obtained by acquiring the energy consumption data and the system information of each physical node to make the energy-saving dispatching algorithm so as to migrate the virtual machines in the physical nodes, and accordingly resource utilization rate of the physical nodes provided with the virtual machines can be maximized to lower energy consumption of the data center.