A printing system capable of properly changing a content of a notification based on occurrence of a full state of a sheet in an output destination. A printing system which is able to output a sheet to any of a plurality of sheet stacking units includes a determining unit configured to determine whether a first setting for selecting a specific sheet stacking unit as an output destination of the sheet is performed or a second setting for automatically selecting any sheet stacking unit from among the plurality of sheet stacking units as the output destination is performed, a notification unit configured to perform a notification according to occurrence of a fully-stacked state in the output destination, and a control unit configured to change a content of the notification based on the determining by the determining unit.