[en] During August 2008 to August 2009, both alpha etched track detector technique and RAD7 radon monitor were used to monitor the indoor radon concentrations at 83 sites of 79 buildings, bungalows and villas in Urumqi region. The results indicate that the indoor radon concentrations are in range of 19-154 Bq/m³, with an average of 55.4 Bq/m³, significantly higher in winter than in summer, and equal in spring and autumn. The coal burning may be the main cause of higher radon concentrations. As a result, the prevention and control measures are put forward. (authors)