A control system for exhibition hall lighting circuit includes a first light intensity sensor, a second light intensity sensor, a data analysis module, a controller, a cabinet light control module, an exhibition hall light control module, a residual light control module, a display module, an alarm module, a power supply monitoring module, a UPS power supply, a power supply, a time synchronization module and an activity detection module. The first light intensity sensor and the second light intensity sensor enable the system to automatically turn on lights in an exhibition hall for lighting when the light intensity in the exhibition hall satisfies certain requirements. The activity detection module enables the system to turn on exhibition hall lights and cabinet lights in the exhibition hall when a light intensity difference is out of a certain range and there are activities of people in the exhibition hall.