A novel algorithm is proposed to extracts the out-of-plane component of deformation-phase from two continuous fringe patterns. The velocity field between two consecutive frames is estimated by digital speckle correlation method (DSCM). According to the optical flow constrained equation, the whole-field deformation-phase map is obtained by the estimations of the velocity field and the fringe frequency of the original image. The principle of measuring deformation-phase method is introduced based on DSCM. The experiment and computer simulation are done on the deformation-phase measurement of disk center loading and fixed around. The effectiveness of this method is verified. Simulation and experimental results show that the proposed method can connect the visible in-plane velocity field and the extraction of out-of-plane deformation-phase and demodulate the out-of-plane component of deformation-phase from the whole-field. The proposed method has advantages in the operation process as easy and convenient, and it neither need conversion of fringe image to frequency domain, also do not need phase envelope operation. The deformation-phase information extracted from denser fringe place is more accuracy. The proposed algorithm provides a new approach for whole-field deformation-phase measurement and dynamic object deformation measurement.