Abstract: An energy management apparatus, energy management method, and non-transitory tangible computer readable medium thereof are provided. The energy management apparatus receives a plurality of first operation data and environment data, derives a plurality of simulated energy data through energy simulation based on the first operation data and the environment data, calculates an error value between a real environment value and a simulated environment value of the simulated energy data, decides a simulation objective value according to the error value, and decides a plurality of second operation data through energy simulation based on a search algorithm and the simulation objective value. The first operation data correspond to a first time interval, each of the first operation data corresponds to one of a plurality of devices, and the second operation data correspond to a second time interval, and each of the second operation data corresponds to one of the devices.