We investigate the time-evolution of the atom's occupancy in the system of twomode coherent fields interacting with two atoms in Bell states via multiphoton process. The results show that the atom's occupancy is zero if the two atoms are initially in Bell state ■(|+,－>－|－,+>). The atom's occupancy is influenced by three factors,which are the intensity of two dipole-dipole coupled atoms,the coupling constant of light and atoms and the absorbing or emitting photon number per atomic transition,if the two atoms are initially in the other three Bell states. The oscillation frequency of the atom's occupancy accelerates apparently with the increase of the intensity of two dipole-dipole coupled atoms or the absorbing or emitting photon number per atomic transition. The collapse-revival phenomenon of the atom's occupancy disappears when the intensity of two dipole-dipole coupled atoms is increased to some point.