The photocarrier theory has been introduced into the photoelasticity, moire, speckle and holographical interferometries recently. In the paper, the general frame of the photocarrier digital image processing is presented and the system software is shown in program bloc ks. The processing techniques are discussed such as grouping and demodulating etc.. Some new concepts are introduced and the carrier schemes are given. Some methods and the corresponding software system are developed and present a new way of image processing.