The invention is applicable to the technical field of fire fighting, and provides a fire-retardant type transformer fire fighting system. The fire-retardant type transformer fire fighting system comprises a fire fighting device and a moving mechanism; the fire fighting device comprises a fire detection module, a controller and an ejection module; the fire detection module comprises a scanner and an infrared thermal imager, and the ejection module comprises a flame retardant bomb container for containing flame retardant bombs and an ejection mechanism; the controller controls the moving mechanism to drive the fire fighting device to move; the scanner scans the environmental monitoring data of the target area; the infrared thermal imager is used for shooting an infrared image of the target area; and the controller determines the ignition position according to the environmental monitoring data and the infrared image, generates and sends an ejection command to the ejection mechanism according to the ignition position, and the ejection mechanism ejects the flame retardant bombs from the flame retardant bomb container to the ignition position according to the ejection command. The fire-retardant type transformer fire fighting system can extinguish the ignition point in time when the fire is small, avoid irreversible damage to the transformer, and ensure safe and stable operation of the transformer.