An air-conditioning system, wherein the air-conditioning system comprises: a compressor, a first pipeline, a second pipeline, an evaporative condenser, a first liquid separator, and a second liquid separator; wherein, the first pipeline is in communication with the compressor; the second pipeline is in communication with a same compressor, and the first pipeline and the second pipeline are arranged independently; the evaporative condenser is provided in the first pipeline and the second pipeline, and refrigerant in the first pipeline and refrigerant in the second pipeline perform heat exchange with the evaporative condenser respectively; the first liquid separator is arranged in the first pipeline, and an outlet of the first liquid separator is in communication with the compressor; the second liquid separator is arranged in the second pipeline, and an outlet of the second liquid separator is in communication with the compressor; the first liquid separator is disposed adjacent to the second liquid separator; the compressor comprises multiple cylinders, and the multiple cylinders are configured to work independently; the multiple cylinders comprise a first cylinder; the outlet of the first liquid separator is in communication with a suction port of the first cylinder; a first end of the first pipeline is in communication with a discharge port of the first cylinder; and a second end of the first pipeline is in communication with an inlet of the first liquid separator; the multiple cylinders further comprise a second cylinder; the outlet of the second liquid separator is in communication with a suction port of the second cylinder; a first end of the second pipeline is in communication with a discharge port of the second cylinder; a second end of the second pipeline is in communication with an inlet of the second liquid separator; characterized in that: a volume ratio of the second cylinder to the first cylinder is T1, wherein 0.15≤T1≤0.4; and a diameter ratio of the suction port of the second cylinder and the suction port of the first cylinder is T2, wherein 0.7≤T2≤0.9. a compressor, a first pipeline, a second pipeline, an evaporative condenser, a first liquid separator, and a second liquid separator; wherein, the first pipeline is in communication with the compressor; the second pipeline is in communication with a same compressor, and the first pipeline and the second pipeline are arranged independently; the evaporative condenser is provided in the first pipeline and the second pipeline, and refrigerant in the first pipeline and refrigerant in the second pipeline perform heat exchange with the evaporative condenser respectively; the first liquid separator is arranged in the first pipeline, and an outlet of the first liquid separator is in communication with the compressor; the second liquid separator is arranged in the second pipeline, and an outlet of the second liquid separator is in communication with the compressor; the first liquid separator is disposed adjacent to the second liquid separator; the compressor comprises multiple cylinders, and the multiple cylinders are configured to work independently; the multiple cylinders comprise a first cylinder; the outlet of the first liquid separator is in communication with a suction port of the first cylinder; a first end of the first pipeline is in communication with a discharge port of the first cylinder; and a second end of the first pipeline is in communication with an inlet of the first liquid separator; the multiple cylinders further comprise a second cylinder; the outlet of the second liquid separator is in communication with a suction port of the second cylinder; a first end of the second pipeline is in communication with a discharge port of the second cylinder; a second end of the second pipeline is in communication with an inlet of the second liquid separator; characterized in that: a volume ratio of the second cylinder to the first cylinder is T1, wherein 0.15≤T1≤0.4; and a diameter ratio of the suction port of the second cylinder and the suction port of the first cylinder is T2, wherein 0.7≤T2≤0.9.