A control system according to the present disclosure performs system control for controlling a system including a mobile robot that is autonomously movable and operable by a user. The mobile robot includes at least one light-emitting unit. The system control includes mode switch control of switching between an autonomous movement mode and a user operation mode, and the light emission control of controlling the light-emitting unit to emit light in different light emission patterns associated with a plurality of predetermined conditions. The light emission control includes controlling the light-emitting unit to emit light in different light emission patterns, for at least one of the predetermined conditions, depending on whether the mobile robot is in the autonomous movement mode or the user operation mode.