The invention relates to a correlated imaging method and device. The method includes the following steps that: laser is adopted to irradiate a random fluctuation light field formed by means of rotating frosted glass, the light intensity of the light field is obtained by solving the interaction result of the laser and the micro-nano structure of the frosted glass surface; the random fluctuation light field is adopted to illuminate an imaging target, light waves carrying the amplitude and phase information of the imaging target are obtained; and the light intensity of the light waves is detected, correlation calculation is performed on the light intensity of the random fluctuation light field and the light intensity of the light waves, so that the image of the imaging target is reconstructedand generated. According to the correlated imaging method and device adopted, complicated optical modules such as a beam splitter, an area array detector, a digital microlens array or a projection system are omitted, the complexity of the imaging system can be simplified, and imaging speed can be improved; the interaction result of the incident light waves and the micro-nano structure of the frosted glass surface is solved directly through Maxwell's equation; the distribution of the random fluctuation light field illuminating the imaging target can be obtained; the resolution of image reconstruction can be improved; and sub-wavelength structure imaging is realized; and the use range of associated imaging is extended.