The quantum reduced entropy evolution of a V-type three-level atom interacting with the twomode odd-even entangled coherent field is investigated. The effects of the detuning,mean photon numbers of field,the atom's initial state and the degree of the entanglement of the two-mode odd-even entangled coherent fields on the entropy are discussed. The results show that the oscillation of the entropy presents collapses and revivals with the increasing of the detuning or the mean photon number. The mean-value of field entropy decreases with the increasing of the detuning. But it increases with the increasing of the mean photon number. The mean-values of field entropy are higher when the atom is initially in excited state or superposition state than that of in ground state. The mean-value and the amplitude of field entropy decrease with the increasing of the degree of the entanglement of the two-mode odd-even entangled coherent fields.