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Based on the RHtest method and the detailed metadata archive, the homogeneity of the monthly precipitation data from 1961 to 2009 of 1725 meteorological observation stations is examined and adjusted, taking Bomi, Yuanyang and Chaohu stations as examples. The results show that the homogeneity detection method works well for the examination of the precipitation data over China and has high prospects. It is more beneficial to the selection of the reference series to use 2400 stations monthly precipitation data, which has the higher density. Using both mathematical statistical analysis and subjective judgments with metadata is more reasonable to detect the homogeneity of the series. Only about 21 percent records are non homogeneous among the detected stations, which indicates that the homogeneity of the precipitation is good in most areas of China. For the non homogeneous stations, the change of location is one of the main causes. Applying the method of Rhtest, the series that have breakpoints are adjusted and the trends of the series are analyzed. It is found that the yearly precipitation trend has changed obviously and the homogeneity is improved well after adjustment.