Domestic intelligent water-saving device

The household intelligent water saving apparatus to purify waste water for reuse includes casing, water tank inside the casing, water level sensor and water pump inside the water tank, water tap on the casing, basin and accumulator. The basin drain outlet is connected via filter, turbidity detector and solenoid valve to the water tank; the solenoid valve has the other end connected to the drain pipe; the drain pipe has overflow port to the water tank, solenoid valve and drain port; the water tank is connected to water tap via water pump; the storage button, the drain button and the turbidity detector control the solenoid valve; and the turbidity detector controls the solenoid valve to exhaust dirt water. The present invention has the advantages of saving water, reducing city sewage amount, simple structure, etc.