A control device for a power machine including a drive source , a hydraulic pump driven by a driving force of the drive source , a power take off device configured to transmit a portion of the driving force of the drive source to the hydraulic pump , a power transmission device including a hydrostatic continuously variable transmission , an input shaft connected to the power take off device , and an output shaft connected to a load , and configured to transmit the driving force input to the input shaft to the output shaft, and an operation device that is configured to provide an instruction regarding a magnitude of the driving force of the drive source , the control device characterized by comprising: a target circuit pressure specifying unit configured to specify a target circuit pressure which is a target pressure of the hydrostatic continuously variable transmission ; a measurement value acquisition unit configured to acquire an actual circuit pressure which is a measurement value of a pressure of the hydrostatic continuously variable transmission ; a brake torque determination unit configured to determine a brake torque based on the target circuit pressure and the actual circuit pressure, the brake torque which is a torque consumed by the hydraulic pump ; and a pump control unit configured to control the hydraulic pump based on the brake torque. a drive source , a hydraulic pump driven by a driving force of the drive source , a power take off device configured to transmit a portion of the driving force of the drive source to the hydraulic pump , a power transmission device including a hydrostatic continuously variable transmission , an input shaft connected to the power take off device , and an output shaft connected to a load , and configured to transmit the driving force input to the input shaft to the output shaft, and an operation device that is configured to provide an instruction regarding a magnitude of the driving force of the drive source , the control device characterized by comprising: a target circuit pressure specifying unit configured to specify a target circuit pressure which is a target pressure of the hydrostatic continuously variable transmission ; a measurement value acquisition unit configured to acquire an actual circuit pressure which is a measurement value of a pressure of the hydrostatic continuously variable transmission ; a brake torque determination unit configured to determine a brake torque based on the target circuit pressure and the actual circuit pressure, the brake torque which is a torque consumed by the hydraulic pump ; and a pump control unit configured to control the hydraulic pump based on the brake torque. a target circuit pressure specifying unit configured to specify a target circuit pressure which is a target pressure of the hydrostatic continuously variable transmission ; a measurement value acquisition unit configured to acquire an actual circuit pressure which is a measurement value of a pressure of the hydrostatic continuously variable transmission ; a brake torque determination unit configured to determine a brake torque based on the target circuit pressure and the actual circuit pressure, the brake torque which is a torque consumed by the hydraulic pump ; and a pump control unit configured to control the hydraulic pump based on the brake torque. <EOS>