The invention discloses a control system and a control method for a parking space lamp assembly. The system comprises an outer frame, a power supply module, a monitoring module, an illuminating module and a control module, wherein the power supply module is arranged on the outer frame; the monitoring module comprises a first monitoring unit, a second monitoring unit and a third monitoring unit; the illuminating module comprises a first illuminating unit, a second illuminating unit and a third illuminating unit; light emitted from the first illuminating unit, the second illuminating unit and the third illuminating unit is different in color; and the control module is used for controlling opening or closing of the illuminating module according to a monitoring signal received by the monitoring module. According to the control system and the control method for the parking space lamp assembly disclosed by the invention, illuminating for parking spaces can be achieved; and intelligent supervision on the parking spaces can also be achieved; and the control system for the parking space lamp assembly disclosed by the invention is simple in structure and low in cost.