The largest source of the groundwater recharge in Beijing is precipitation infiltration. The water balance method based on remote sensing was contrasted with the traditional water-table fluctuation method of groundwater resources assessment. The total recharge in Beijing plain in 2011 calculated by the former method is 13.13×108 m3 . The vertical infiltration recharge of groundwater in the plain calculated by the latter method is 17.39×108 m3 . The results show that they have very high correlation, R2 =0.9631. Both of methods have the applicable condition with the advantages and disadvantages.