A servo-press machine that includes a power supply device, a motor rotation control section, a servomotor and a capacitor connected between a positive power supply path (P, 120) and a negative power supply path (N, 120) that connect the power supply device and the motor rotation control section, the servo-press machine being configured to rotationally drive the servomotor based on slide motion information while supplying a drive power supply voltage (Vpn), and to perform a press-forming operation while converting rotational motion of the servomotor into a vertical movement of a slide through a slide drive mechanism, the servo-press machine comprising: drive power supply voltage calculation means (21, 22, 23) that is configured to calculate a drive power supply voltage (Vpn) between the positive power supply path (P, 120) and the negative power supply path (N,120) by utilizing the slide motion information; induced voltage calculation means (21, 22, 23) that is configured to calculate an induced voltage (Vm) of the servomotor by utilizing the slide motion information; low-voltage state determination means (21, 22, 23) that is configured to determine whether or not the calculated drive power supply voltage (Vpn) at a predetermined timing is lower than the calculated induced voltage (Vm) corresponding to the drive power supply voltage (Vpn); and correction instruction output means (21, 22, 23, 26) that outputs a correction instruction for speed-related data contained in the slide motion information when the low-voltage state determination means (21, 22, 23) has determined that the calculated drive power supply voltage (Vpn) is lower than the calculated induced voltage (Vm), wherein the induced voltage (Vm) is reduced to a value lower than the drive power supply voltage (Vpn), by at least one of reducing a rotational speed of the servomotor, reducing an acceleration rate of a rotational speed of the servomotor, delaying an acceleration start time of a rotational speed of the servomotor and decelerating a rotational speed of the servomotor. drive power supply voltage calculation means (21, 22, 23) that is configured to calculate a drive power supply voltage (Vpn) between the positive power supply path (P, 120) and the negative power supply path (N,120) by utilizing the slide motion information; induced voltage calculation means (21, 22, 23) that is configured to calculate an induced voltage (Vm) of the servomotor by utilizing the slide motion information; low-voltage state determination means (21, 22, 23) that is configured to determine whether or not the calculated drive power supply voltage (Vpn) at a predetermined timing is lower than the calculated induced voltage (Vm) corresponding to the drive power supply voltage (Vpn); and correction instruction output means (21, 22, 23, 26) that outputs a correction instruction for speed-related data contained in the slide motion information when the low-voltage state determination means (21, 22, 23) has determined that the calculated drive power supply voltage (Vpn) is lower than the calculated induced voltage (Vm), wherein the induced voltage (Vm) is reduced to a value lower than the drive power supply voltage (Vpn), by at least one of reducing a rotational speed of the servomotor, reducing an acceleration rate of a rotational speed of the servomotor, delaying an acceleration start time of a rotational speed of the servomotor and decelerating a rotational speed of the servomotor.