To supply a sheet from a sheet storage unit where sheets of a matching size are set while ignoring a grouping setting which is set to the sheet storage unit when a printing job in which a sheet size is specified is received.

A printing system in which sheet members are supplied from a plurality of sheet storage units, comprises: grouping setting means for making setting of grouping the plurality of sheet storage units; and control means which controls switching between a paper supply using a specific sheet storage unit and a paper supply using a sheet storage unit storing sheets of a specific sheet size on the basis of paper supply method for supplying a sheet member designated by the printing job received from an information processing device.