A new refocusing criterion taking advantage of both intensity and phase information of object wave front is applied to detect a focal plane. The wavefront of object includes amplitude and phase information and amplitude information is mainly employed to locate the focal plane on account of intensity of holograms is on behalf of amplitude and easy to obtain. The study of the correlation coefficient (CC) method on intensity has been proved. Phase information is analyzed and employed in CC method and focusing distance obtained from the peak of CC curve. The difference between the two focal distance obtained by phase information and amplitude information is due to that there is a difference on amplitude and phase of wave front. The two distance obtained from CC curve of amplitude and phase is weighted based on linear weighting and a final focal plane is positioned. Experiments validate that it works effectively.