By using NOAA/AVHRR data of the polar orbit meteorological satellite from 1998 to 2007, the water pollution information was collected from remote sensing image translation, the water color conditions in the Bohai Bay in spring during these ten years reveal the water pollution situation evolution. The results show that the Bohai Bay waters began to display the largescale pollution in 1999, of which the most serious was in 2002, it was improved in 2003 and 2004, but between 2005 and 2006, the pollution area was extended, only in the recent two years the pollution has had a major improvement. However, since 2000 the turbid water color situation of the Yellow River mouth still has not been significantly improved. The major reasons for pollution situation in the Bohai Bay are analyzed in this paper, which would provide the objective basis effectively on reasonably controlling and high effectively treating water pollution for governmental departments concerned.