The gas-water relative permeability curve is an important basic parameter to describe the gas-water flow law of water-producing gas reservoirs. However，it is still controversial to determine the gas-water relative permeability curve by the water-drive-gas method or the gas-drive-water method. Taking reservoirs in Yuanba gas field as the research objects，the systematic laboratory experiments were conducted to study the gas-water relative permeability curves of porous and fractured cores. The gas-water relative permeability curves of cores from different types of reservoirs were compared and analyzed，and the test method was recommended for the gas-water relative permeability curves in water-producing gas reservoirs. The results demonstrate that the gas-water relative permeability curves of fractured cores are concave，which are quite different from conventional X-shaped curves；compared with that of fractured cores，the gas-water relative permeability curves of pored cores move to the right as a whole；the ranges of two-phase flow saturation are wider，and the waterphase relative permeability rises more slowly. Compared with that by the gas-drive-water method，the irreducible water saturations from the permeability curves by the water-drive-gas method are closer to the actual situation of the reservoir；the water phase flow capacity is weak，while the gas phase flow capacity is greater than that of the water phase. The experimental design is in line with the gas-water flow process in water-producing gas reservoirs. Therefore，for the productivity evaluation and development plan design for water-producing gas reservoirs，it is recommended to use the gas-water relative permeability curve tested by the water-drive-gas method for numerical simulation.