PROBLEM TO BE SOLVED: To provide an operation display method and an operation display device with which an operator can determine whether a machine is in processing action or stopped at a glance in a forging pressure machine such as especially a press brake, and in which working efficiency is improved by achieving safety and security during the work.;SOLUTION: An operation display method of a machine tool which has a ram for holding an upper die and vertically moves between prescribed strokes in the vertical direction, turns on a green display lamp with a detection signal indicating that the preparation for processing a work-piece is completed, turns on a red display lamp displaying that processing is performed with a detection signal when it is detected that the ram is started to work by transmitting an ON signal to an actuator with a switch operation by an operator, and turns off the red display lamp with a detection signal indicating the termination of processing.;COPYRIGHT: (C)2015,JPO&INPIT
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