Working principle of the system: When the fire detectors installed in each shelf detect abnormal situations (smoke is generated and reaches an appropriate concentration, temperature rises sharply or reaches a certain value), the abnormal signal is transmitted to the fire alarm host. The fire alarm host sends an alarm signal and transmits it to the central controller of the stacker crane through a dedicated network interface. The central controller of the stacker crane triggers the stacker crane to quickly move to the abnormal storage position, instructing the handling robot (loading water-based fire extinguishers) to remove the abnormal tray and put it into the sealed container of the stacker crane for sealing and spraying extinguishing agent to extinguish the fire. At the same time, the tray is transported to the water tank arranged on the automatic line and quickly thrown into the water tank. Due to the specific circuit and code set during the installation and debugging of each detector, when the fire alarm host sends an alarm signal, it will accurately display and transmit the corresponding shelf location number of the alarm detector installation to the stacker crane controller.