On basis of the theory of limited photon signal-noise ratio and Fourier spectrum a new method is proposed for
general assessment and analysis of a high-speed photoelectronic imaging systems. Several expressions are given to
relate system's temporal-spatial MTF and resolutions with its characteristic image element size, exposure time,
target illumination, and main parameters of the optical objective and imaging device. Some problems are discussed
in the paper about system's image quality and its limiting factors, and explained visually by several theoretical
figures. It is shown that the prediction by expressions are partially supported by some experiment results. The
theoretic result is very useful in analysis and assessment of high-speed photoelectronic imaging systems.