In this paper, we have investigated the influence upon the modification of the theory of equivalent spectrum of photons by Weizs?cker-Williams, given by the electromagnetic structure of the nucleon. To overcome the difficulty caused by the divergence in the calculation with the form factor of the Clementel-Villi's type, we have suggested also a way of modifying the form factor.The results of the calculation show that within the region in which the method of equivalent spectrum of photons works, our results conform to Weizs?cker-Williams' theory, if the masses for the two particles in collision are considerably different; however, the influence of the structure is very evident, if the masses of the two particles are approximate to each other.