PROBLEM TO BE SOLVED: To provide a gas-liquid contact method by which gas-liquid contact can be performed using a gas-liquid contactor of a compact and low-power configuration.SOLUTION: The gas-liquid contact method is a circulation-type gas-liquid contact method in which a part of treatment water and target gas is discharged outside a system as treated water and treated gas while circulating, in a mixed manner, the treatment water and target gas, and a balanced amount of water before treated and gas before treated is allowed to flow into the system. The method uses a gas-liquid contactor which includes: a storage tank 1; a gas-liquid contact tower 10 which includes a water supply port at an upper portion, and a drain port and an air chamber section at a lower portion; circulating pipeline 15 which connects the storage tank with the water supply port; contact pipeline 13 which connects the storage tank with the drain port; and liquid transfer means 4 for circulating liquid between the storage tank and the gas
