The variational approach to two-body correlations in atoms proposed by Wilets et al, and developed by bresent authors is applied to treat the correlations of excited states of the atoms. The (ls)(nl)1,3L excited states of helium iseelectronic sequence, the (1s)2(2s)(nl)3L states of beryllium isoelectronic sequence and the (1s)2(2s)2(nl)2L states of boron have been calculated.The results show that these correlation wave functions have simple structure and are feasible in caloulation application. The accuracy of our method is very close to those of more complicated CI and 1/Z perturbation expansion methods.