The invention provides an air-conditioning system. The air-conditioning system is provided with air flues, and the air flues comprise an air inlet channel and an air exhaust channel both communicated with the indoor space. The air-conditioning system further comprises a dehumidification system, a heat pipe system and a heat pump system, wherein a first part of the dehumidification system is located in the air inlet end of the air inlet channel, and a second part of the dehumidification system is located in the air outlet end of the air exhaust channel; the heat pipe system is arranged in the air inlet channel, is located between the first part of the dehumidification system and the air outlet end of the air inlet channel and comprises a first heat exchanger and a second heat exchanger; the heat pump system comprises a main cooler, an evaporator and a compressor, the main cooler is arranged in the air exhaust channel and is located between the air inlet end of the air exhaust channel and the second part of the dehumidification system, the outlet end of the evaporator is communicated with the inlet end of the compressor, the outlet end of the compressor is communicated with the inlet end of the main cooler, and the outlet end of the main cooler is communicated with the inlet end of the evaporator. According to the air-conditioning system, system components are simplified, control is convenient, and the operation stability of the system is improved.