[Object] To propose a control apparatus, a control system and a control method which are capable of causing another light source to adaptively emit light at a timing at which light emitted from one light source changes.[Solution] A control apparatus including: a light source control unit configured to control light emission of a second light source on the basis of profile of light emitted from a first light source and a synchronization signal for synchronizing a timing between the first light source and the second light source for radiating light on a surgical region.