Mercury flux at the air-and-soil interface in Guiyang and its suburbs was measured with the dynamic flux chamber method.At the same time,meteorological parameters such as air temperature,soil temperature,humidity,solar radiation,wind direction and wind speed were recorded with a multi-function mini-weather station.The results at these four sites, show that concentrations of mercury in the air were significantly elevated over the global background values(1.5~2.0 ng m^-3), which indicates that the air of Guiyang and its suburbs was polluted to a varying extent due to anthropogenic atmospheric mercury emissions.The results also illustrate that Hg flux was significantly correlated with both solar radiation and soil temperature.