A process-controlling device enables the prevention of process deviation from preset standardized operations and the occurrence of abnormal effects, even if the baking machine is accidentally started without setting up the processing time. The process-controlling device alters the preset processing times by inputting external input data, performing successively each step of the process in accordance with each of the altered processing times allocated to each step of the preset process. A time data-inputting device for inputting time data equivalent to the difference between each of the preset processing times and each processing time to be altered, and a processing time-altering device for increasing or decreasing the time data against the preset processing time and altering the preset processing time to the new processing time.