The basic principle of the photoelectric mixing technology is elaborated. The research progress of the photoelectric mixing technology is traced and summarized from two ways of the independent photoelectric devices and the combined photoelectric devices. Inspired by the microwave photon frequency conversion technology, a photoelectric mixing method is proposed based on the bulk electro-optic modulator. This method uses the electro-optic modulator to demodulate the frequency mixing on the optical field and uses the high-resolution and low-cost image sensors at the back end, which breaks through the limitation of the array size on the image resolution and achieves the advantages of high energy efficiency and high signal-to-noise ratio.