A new method of wavefront sensing based on fiber coupling in the adaptive fiber optics collimator (AFOC) array has been proposed. The scheme and the recovery process of this sensor are introduced. An experiment of recovering static aberrations utilizing such method with a 7-element AFOC array with filled factor of 0.875 is presented. Experimental results reveal that the wavefront recovery residual error RMS is less than 0.116 μm, under the conditions where the original aberration is with RMS of 0.674 μm and mainly includes Zernike modes of low orders. This method aims at providing abilities for active wavefront sensing and efficiently correcting outside aberrations to the future laser transmission systems based on fiber collimator arrays.