The invention belongs to the field of indoor temperature regulation devices and particularly relates to a double-medium circulating cooling and heating energy-saving air conditioner. The double-medium circulating cooling and heating energy-saving air conditioner comprises a unit body, and an air inlet and an air outlet are formed in the unit body. The double-medium circulating cooling and heating energy-saving air conditioner is characterized in that a heat exchange fan, a water circulating system, a refrigerant circulating system and a heat exchanger are installed in the unit body; the heat exchanger comprises a water heat exchange pipe and a refrigerant heat exchange pipe, and the two sets of pipelines are mutually twined and stacked together, but do not communicate with each other; the water circulating system communicates with the water heat exchange pipe of the heat exchanger; and the refrigerant circulating system communicates with the refrigerant heat exchange pipe of the heat exchanger. According to the double-medium circulating cooling and heating energy-saving air conditioner, the advantages of a water air conditioner and a refrigerant circulating air conditioner are combined, the heat exchanger replaces an outdoor unit air cooling heat exchange part of a traditional refrigerant circulating air conditioner, heat exchange is conducted through an underground water source with the relatively-constant temperature, the dry problem of air under normal operation of the refrigerant air conditioner is improved through an independent humidifying system, temperature and humidity control and remote control can be achieved simultaneously, and the design is more humanized.