An object of the present invention is to provide a printing control method and a printing controller which are capable of performing high-quality printing in a short period of time, and which are capable of reducing human error. To achieve this end, the printing control method is used to control a printing system, which is equipped with a server to store printing data which contains platemaking data and related information, a printing machine equipped with a plurality of printing presses, a terminal unit for acquiring the printing image data and outputting command information to the printing machine, detectors for detecting a state of a printed page, and controllers for controlling the printing presses based on the printing data and detection information. In a pre-printing step, the operating conditions of the printing machine are loaded from the server, a supply of ink is preset based on the printing data, one of a plurality of sets of data for selection is selected as printing data, platemaking data is displayed on a display unit, and the state of arrival of the platemaking plate data to the terminal unit and the data that arrived are confirmed. In a printing step, feedback control employing the detection information is performed based on the data sent from the terminal unit.