Experimental studies of beta-decay measurements of the neutron drip line nuclei Li-11 and Be-14 are presented. beta-decay sr:hemes of these nuclei are determined by measuring beta-rays, delayed neutrons and gamma-rays in triple coincidence, The decay schemes of both Li-11 and Be-14 associated with single neutron emission are unambiguously determined. New levels in their daughter nuclei, Be-11 and B-14, are found. In addition, the deduced level scheme of B-14 indicates the lowering of 2s(1/2) single neutron orbital with respect to 1p(1/2) orbital in the N=9 isotones. Such behavior is known to exist in N=7.