Complete plant control device and complete plant control method

The invention provides a complete plant control device and a complete plant control method in which suppression of the offset error is possible without using feedback control. An FF control device (611) uses the control output corresponding to the interference deviation to perform feed-forward control for controlling the processing performed by the complete plant (600) to be controlled. An ON/OFF timing determination device (612) adjusts the timing at which the FF control device (611) performs the feed-forward control on the basis of the actual state quantity (xFB) relating to the complete plant (600) to be controlled. 本发明提供不使用反馈控制就能够抑制偏离误差的成套设备控制装置以及成套设备控制方法。FF控制装置(611)使用与干扰偏差相应的控制输出，进行控制对象成套设备(600)所进行的处理的前馈控制。接通/断开定时决定装置(612)根据与控制对象成套设备(600)相关的状态量实绩(xFB)，调整FF控制装置(611)进行前馈控制的定时。