With the increase of the number of channels, bandwidth and resolution, it makes greater demands on data handling capacity and speed. In some specific applications, the volume and power consumption are important factors to consider when designing a data processor. The radar signal processing mode, which relies solely on digital technology, has exposed limitations in computing power, computing speed and power consumption. Based on the research of new information processing theory and method, this paper puts forward the opticselectronics cooperative information processing. The technology combines optical computing operations with electronic logic control, utilizes the spatial optical information processing to complete the highdensity and massive data arithmetic operations, and applies the electronic processing to the transmission control, logic operations and other operations. Photoelectric co-processing has highspeed parallel processing characteristics and the processing relies heavily on optical passive devices with very low power consumption. This paper provides the examples of applications about the optics-electronics cooperative information processing in synthetic aperture radar image formation and array radar beamforming.