The disclosure more appropriately determines a condition of a step executed at the time of creating a product of printing. A printing system (10) that creates a product of printing by performing at least printing includes a printer (16) which is a printing apparatus that executes a printing step of performing printing by ejecting ink; a washing machine (20) which is a post-processing machine that executes a post-processing step on a printed matter obtained by performing the printing step in the printer (16); and a control device (12) that determines a condition of a post-processing step based on a condition of the printing step.