The invention discloses a household constant temperature and humidity square bin system which comprises a constant temperature and humidity air forming square bin, a water pool, a water supply and drainage system, an air supply pipeline, an air return pipeline and a central control cabinet, wherein the constant temperature and humidity air forming square bin comprises an air return and suction unit, a draught fan, a water circulation and spraying unit and an air supply unit; the air return and suction unit is provided with a window and can directly communicate with the outside world through the window; the air return and suction unit is further provided with a connector and can be connected with the air return pipeline through the connector; and the draught fan is arranged between the airreturn and suction unit as well as the water circulation and spraying unit. The household constant temperature and humidity square bin system disclosed by the invention has the advantages that the pollution is avoided, the electric energy consumption is low, the water consumption is low, the noise is low, the air change rate is low, the room temperature and humidity are moderate, and the human body feels comfortable. Meanwhile, due to a square bin structure, the household constant temperature and humidity square bin system further has the advantages of being simple and convenient to transport,mount and dismount, small in occupied area, low in investment, and high in operability.