The ESR signal of the Co0.6Zn0.4Fe2O4 ferrite system was recorded at room temperature. The experimental magnetic moment value was estimated by means of integrated intensity of ESR signal and its maximum position. It has been used some theoretical relations were used to estimate the values of magnetic moment of the studied ferrite. The cation distributions between tetrahedral and octahedral sites were established from the values of magnetic moment.In addition, the lifetimeof energy level was determined.