The forms of mercury in the wet flue gas desulfurization outlet flue gases from two generating units of coal-fired power plants in Xinjiang, using the standard Ontario Hydro Method Calculations of the mercury E-f and the estimation of mercury emissions were performed based on the monitoring results, flue gas flow rates, coal consumption, and lower heating values (LHVs). The concentrations of Hg-P, Hg2+, Hg degrees, total gaseous mercury, and total mercury in the flue gases were 0.07-0.20, 0.13-0.65, 1.16-1.19, 1.29-1.84, and 1.49-1.91 g/Nm(3), respectively, all of which were far below the emission limit of 30 g/Nm(3) specified in the national standard. The emission factors for Hg-P, Hg2+, Hg degrees, the total gaseous mercury, and the total mercury were 0.03-0.12, 0.08-0.23, 0.42-0.69, 0.65-0.76, and 0.68-0.89 mg/GJ, respectively. Mercury emissions were estimated by using the aforesaid data, and the results showed that the total mercury emissions from flue gases of power plants No. 1 and 2 were 14.5 and 19.4 kg/a, respectively. The total mercury concentrations in the flue gases from the coal-fired power plants in Xinjiang were much lower than those of coal-fired power plants in other regions of China, the United States, and Europe.