The smart water immersion sensor can sense the water leakage and immersion in real time, and view the water immersion status data anytime and anywhere. Water immersion sensors are widely used in various scenarios, whether it is the potential water leakage failure scenarios of domestic appliances such as water pumps, water pipes, sinks, water tanks, fish tanks, washing machines, air conditioners, radiators, refrigerators, water heaters, or the realization of safety protection through environmental monitoring of specific items, such as sanitary rooms, kitchens, balconies, lockers, warehouses, shops, machine rooms, banks, workshops, breeding farms, etc. will benefit from the monitoring of water immersion sensors.