The invention discloses a photosensitive element array device, which are used for a holographic three-dimensional display system, and includes a photosensitive element array, the photosensitive element array is used for being arranged on the side, opposite to an object, of an information collection lens array plate. The photosensitive element array is provided with M * N photosensitive elements; the photosensitive elements are used for recording a spatial spectrum image Imn acquired by each lens of the information acquisition lens array plate; the resolution of each photosensitive element is not less than the preset number J * K of the body pixels Hjk of the object in the object space, J and K are integers greater than 1, and the spatial spectrum image Imn is expressed as Imn (j, k), j = 1to J, and k = 1 to K. According to the invention, the inherent contradiction between the imaging quality of the microlens array and the resolution of a three-dimensional image which can be displayedby the microlens array in the integrated photograph is effectively overcome, holographic coding and holographic display of three-dimensional space information are realized, and perfect true three-dimensional display visible to human eyes is obtained.