Abstract: According to the method presented in the previous paper, the most prominent features of the method are its high sensitivity and making use of the scanning technique, the network copolymerization of styrenc with cthylene glycol dimcthacry-late and divinyibenzene were studied here by means of laser light scattering. Several parameters characterizing the properties of network copolymerization, the speed and point of gelation, the point of phase separation, the correlation coefficient α ard the mean squared average dielectric constant fluctuation₆₂, were obtained. And some comparisons among the three systems were studied. Based on the experiments and the comparisons, this method makes possible to understand the properties of network copolymerization and ihc activity of monomers at quantitative level conveniently. Therefore, the law of the kind of chemical reactions could be understood letter.