An information processing system includes: a first unit that receives an operation input; and a second unit that is formed independently from the first unit and operates in accordance with the operation input, wherein the first unit includes a common managing unit that, with regard to an additional application that is an application that may be added to the first unit, controls import or export of first setting information about a setting of the additional application; and a setting managing unit that, with regard to an internal application that is an application previously installed in the first unit, controls import or export of second setting information about a setting of the internal application, communicates with the common managing unit, combines the second setting information and the first setting information, and transmits combined information to the second unit.