The utility model discloses an emergency lighting system. The emergency lighting system comprises a control machine and an emergency bulb, the control machine comprises a battery, a controller and anemitter. The emergency bulb comprises a battery, a bulb controller, a receiver and a light-emitting element. The control machine is configured to detect power loss at a pair of AC contacts of the control machine. When it is determined that power is lost, the control machine transmits a power control signal to the emergency bulb. The emergency bulb is configured to receive a power control signal. Based on the power control signal, the emergency bulb enables the light emitting element to receive power from a battery of the emergency bulb.