To provide a document preparation support device capable of reducing work burdens of a production side and an order placement side in creating a printed matter.SOLUTION: In a document preparation support system comprising a production side terminal, a confirmation side terminal and a document preparation support device, the document preparation support device includes a communication part for communicating with the production side terminal for producing a production document corresponding to a printed matter and the confirmation side terminal for confirming a confirmation document based on the production document, a production side IF part for extracting a first calibration object to be a calibration object in the production document on the basis of the production document, a confirmation side IF part for extracting a second calibration object to be a calibration object in the confirmation object in the confirmation document on the basis of the confirmation document, and a calibration candidate selection part 24 for using a calibration tool used in the second calibration object to select a calibration candidate to be a calibration candidate from the first calibration object. The production side IF part generates information on the first calibration object selected by the calibration candidate selection part 24. The communication part transmits information generated by the production side IF part to the production side terminal.SELECTED DRAWING: Figure 2