Abstract: Embodiments of the present invention provide an energy management system and an energy management method, the system comprising: a reception unit for receiving energy price information from an energy supplier; an output unit for outputting predicted energy price information by inputting, into an artificial neural network (ANN), environment information including the energy price information; and a determination unit for determining the energy consumption action of each of a plurality of energy consumption devices at time (h) on the basis of determination information including the predicted energy price information, wherein the determination unit repetitively performs, until a set completion condition is satisfied, an update step of updating a Q value determined on the basis of an energy consumption state and an energy consumption action of each energy consumption device along time in order to determine the energy consumption action at time (h).