Using the monthly precipitation at 122 stations in Yunnnan from 1961 to 2009 and the monthly reanalysis data of NCEP/NCAR, the air column precipitalbe water (PW) and water vapor flux in autumn and winter are calculated. Based on those data, the features of water vapor transportation are studied. The relationships of Yunnan precipitation and PW and water vapor transportation are also studied. The results show that the air column PW over Yunnan has a feature of southeast-northwestern ‘U’ pattern. The air column PW over Yunnan is changed from 10 to 32.5 kg·m-2 in autumn but from 5 to 20 kg·m-2  in winter. The precipitation in Yunnan is correlated to the air column PW in autumn and winter. The resource of Yunnan autumn precipitation are from the Indian Ocean, the Bay of Bengal and the South China Sea. The resource of Yunnan winter precipitation is from westerly wind water vapor transportation in middle latitude. The correlation vector distribution of Yunnan autumn precipitation and water vapor transportation is the type of cyclonic-anticyclone. The autumn precipitation is related to the southerly water vapor transportation in the Bay of Bengal and the Indochina Peninsula and to the intensity and location of the westerly wind of low latitude too. The stronger  the monsoon depression in middle and upper troposphere over the Bay of Bengal is, the more  southerly water vapor transportation from the Bay of Bengal and the Indochina Peninsula to Yunnan are, the more  the autumn precipitation in Yunnan is too. The winter precipitation is correlation of the water vapor transportation from the Indochina Peninsula to Yunnan. The less of the air column PW and the less of the meridional water vapor transportation and stronger of the anti-cyclone in middle and upper troposphere over the Bay of Bengal and the Indochina Peninsula are the reasons that precipitation in Yunnan during the autumn and winter of 2009 is less comparing with the climatologically normals.