The invention belongs to the technical field of devices of supplying water for users, and particularly relates to a remotely monitored secondary water supply device. The device comprises a rack, wherein a water storage tank is fixedly arranged on the rack, the water storage tank is connected with a water inlet tube and a water outlet tube, a motor is fixedly arranged on the water storage tank, a rotary shaft is connected in the water storage tank in a rotating manner, one end of the rotary shaft is fixedly connected with an output shaft of the motor, the other end of the rotary shaft is connected with the water inlet tube, blades are fixedly arranged outside the rotary shaft, the rotary shaft and the blades are internally provided with water pipelines that are communicated with each other,the blades are provided with water outlets, the blades are provided with gears, the water storage tank is connected with a cone gear matched with the blades in a rotating manner, the cone gear is connected with a sector gear coaxially, the rack is connected with a rack meshed with the sector gear in a slide manner, a pawl is fixedly arranged on the rack, the rack is connected with a notch wheel in a rotating manner, the notch wheel is connected with a cam coaxially, and an air supply mechanism communicated with the water storage tank is fixedly arranged on the rack. The remotely monitored secondary water supply device can sterilize drinking water stored in a reservoir and is frequently used for water treatment before secondary water supply.