Abstract: To make corrections as effectively as possible according to an environmental temperature of an installation location, an electric discharge machine includes a temperature-displacement measurement unit that measures a transition of a displacement of a reference position and a transition of detected values of temperature sensors, a correction-coefficient calculation unit that calculates correction-coefficient calculated values based on a measurement result of the temperature/displacement measurement unit, a confirmation display unit that displays the measurement result of the temperature/displacement measurement unit and that prompts to input whether to use the correction-coefficient calculated values, and a change-agreement confirmation unit that updates correction-coefficient set values stored in a correction-coefficient set-value storage unit to the correction-coefficient calculated values when an input to an effect of using the correction-coefficient calculated values is received.