The invention provides a cold-radiation and fresh air water-gas circulating system. The cold-radiation and fresh air water-gas circulating system comprises a water chilling unit, a first water pump, acondensed water-gas integrated tube, a water return tube, a cold-radiation pipeline, a fresh air unit, a gas inlet pipeline, a gas conveying pipeline and a gas exhaust pipeline, wherein the condensedwater-gas integrated tube consists of a cold water tube inside, and a gas tube which seals and packages outside the cold water tube; the outlet of the water chilling unit is connected to the inlet ofthe cold water tube, and the outlet of the cold water tube is connected to the inlet of the cold-radiation pipeline; the outlet of the cold-radiation pipeline is connected to the inlet of the water return tube; the outlet of the water return tube is connected to the inlet of the water chilling unit; the fresh air unit is connected to the inlet of the gas tube through the gas inlet pipeline; the outlet of the gas tube is connected to an indoor air inlet through the gas conveying pipeline; an outdoor air exhaust hole is connected to the air exhaust end of the fresh air unit through the air exhaust pipeline. According to the cold-radiation and fresh air water-gas circulating system provided by the invention, the special condensed water-gas integrated tube is adopted for reasonably combininga cold-radiation system to a fresh air system, so that the integral structure is simplified, and the cost is reduced.