Abstract: By applying the new geomagnetic model POMME-4.2S from the CHAMP satellite data and the 10th International Geomagnetic Reference Field models,we have calculated the model value of the Chinese geomagnetic observatories in 2004,and the differences between the model value and observed value are also analyzed.The weighting coefficients are introduced to estimate the total errors of the observatory measurements.The results suggest that the absolute errors of the satellite model and observed value of geomagnetic observatories are either negative or positive.But not all of them are smaller than that of the IGRF model,except their Y component with remarkable smaller errors.The mean square error of X,H components of the two models are not significantly different,but the errors of other components such as Y,Z,F,D,I of POMME-4.2S are smaller than that of IGRF.The relative errors of the same geomagnetic element in different observatories are quite different.