First-principle calculations based on the density functional theory (DFT) method are adopted to investig-ate the influence of a strong electric field on the 7Be half-life.Accordingly,electronic structures of Be and BeO are examined in the presence of a homogeneous electric field.The electron density at the nucleus is estimated upon the geometry optimization.Our computations for the Be metal indicate a 0.02％ increase in the decay rate of the 7Be nucleus,corresponding to a 0.02％ decrease in the 7Be half-life,both at 5.14 V/(A) (0.1 a.u.).Furthermore,it is de-termined that the decay rate of 7Be is not considerably altered up to 3.6 V/(A) in the BeO structure.Our results show that the screening energy of the electron can be dependent on the applied electric field strength.Furthermore,we pre-dict variations in the Coulomb potential at the 7Be nucleus due to electric field application.