Freezing-thawing in mid-high latitudes is an important factor controlling nutrient dynamics. We transplanted peatland columns (TQ) and freshwater marsh columns (SJ) in different latitudes into south seasonal frozen regions to determine the responses of greenhouse gas emissions from different wetlands to the freezing-thawing under climate warming. The decrease in CO2 and CH4 emissions during freezing stage were interrupted by a short emission peak. While N2O uptake rate reduced with decreasing temperature. In the thawing stage, all the three greenhouse gases exhibited emission peaks. CO2 were 159.83 mg m(-2) h(-1) (TQ) and 86.83 mg m(-2) h(-1) (SJ); CH4 were 1.32 mg m(-2) h(-1) (TQ) and 4.07 mg m(-2) h(-1) (SJ); N2O were 72.14 ug m(-2) h(-1) (TQ) and 22.15 ug m(-2) h(-1) (SJ). Meanwhile, N2O transferred from sink into source. With temperature increase, the emission rate of CO2 increased fast, while CH4 and N2O decreased. CO2 emission during freezing-thawing periods was significantly correlated with soil temperature and CH4 emission. Soil active organic carbon also played important roles in greenhouse gases emissions. Our study suggested that more greenhouse gases may release from wetlands into atmosphere in the context of global warming, and the potential release of CO2 and N2O during freezing-thawing periods was much higher in peatlands of permafrost zone.