The design is based on the public's demand for water sanitation and safety in public swimming pools, the head sensor detects the safety condition of the user's swimming pool within 10 meters at intervals of several seconds. In the event of an accident, it will accurately locate the swimming pool and issue an alarm to remind the swimming pool staff to rescue the user in time. And the appearance should not be too rigid, modelling inspiration comes from jellyfish and other sea creatures, after increasing the arc deformation shape is relatively round, in more easily accepted by the public at the same time reduce the crowd will produce accidental bump, at the same time, the sensor is built into the head of the machine, which can realize the real-time interaction between the user and the machine, and enhance the communication between people in the water environment. The function uses the circulation filtration system as well as the water power system, purifies the water quality, saves the manpower and the resources cost.