PROBLEM TO BE SOLVED: To provide a power management device, a power management system, a power management method, a program, a display device, and an utterance device that support a procedure of changing conditions under which electric power is supplied in a system of the power management device to which information on a power consumption that a power consumption measuring device comprising a communication function measures is directly transmitted.SOLUTION: A power management device comprises: a power consumption information acquisition part which acquires power consumption information representing a power consumption from a power consumption measuring device comprising a communication function and connected to a power network; a contract charge information acquisition part which acquires contract charge information representing a charging system for each supply condition of electric power; a conversion processing part which performs conversion into electric charge information representing an electric charge
