In order to analyze the seismic brightness temperature anomalies associated with the Yutian earthquake which occurred at Yutian County，Xinjiang on February 12，2014，daily brightness temperature data were collected from Chinese geostationary meteorological satellite FY- 2E，for the period from May 1，2012 to April 30，2014 and the geographical extent of latitude 30° ～ 45°N and longitude 70° ～ 95° E． Continuous wavelet transform method was used to analyze relative wavelet power spectrum (RWPS) of brightness temperature data for each pixel． And the RWPS time-spatial evolution within analysis area was obtained． The results showed that anomaly started at the vicinity of epicentre since October 2013，and anomalous areas gradually enlarged and stretched towards to Altun fault zone and the eastern part of Western Kunlun fault zone． Anomaly began to appear at fault zones at central Tianshan，southern Tianshan and western part of western Kunlun area which located at the western margin of Tarim basin since November 2013． Then anomalous area further enlarged and gathered along fault zones，and eventually developed anomalous belts along fault zones around the Tarim basin． Anomaly area and amplitude reached maximum in late December 2013 and early January 2014． With the impending of earthquake， anomaly area and amplitude dwindled． Anomaly at the vicinity of epicentre disappeared days before the occurrence of the main shock． But anomaly at Altun and central Tianshan areas still lasted． After the main shock，anomaly attenuated quickly and the whole anomaly disappeared in late February 2014．