Problem: A pyranometer is used to find the global radiation. But, to measure the intensity of solar radiation accurately at a particular sunshine hour, it is required to focus the pyrometer perpendicular to the sun. It is not practical to adjust pyranometer manually to tract the path of  two-directional movement of the sun every time accurately and it is a tedious task. For this, someone is required to be engaged to monitor the sun movement and to change the position of the pyranometer. Approach: To get maximum intensity of solar radiation an automatic controlled dual-axis solar tracking system has been used to get maximum intensity at any time with respect to latitude and longitude of the particular place of measurement. Thus, the problem of manual tracking can be avoided and maximum radiation can be measured at any sun-shine hour. Findings: Data have been obtained from the measurements of intensity of solar radiation on sunny days for both the winter and summer seasons at the latitude of 22.559579⁰ and longitude of 88.490036⁰.The time span has been considered from 6 a.m. to 6 p.m. i.e. 12 hours. Mathematical modeling has been done and computer programmings have been also used to find the values of the intensity of solar radiation theoretically at 12 sunshine hours to compare the theoretical and practical results. It shows the slight variation in the data obtained for theoretical and practical methods. Conclusion: Theoretical results have been obtained by assuming variation of intensity of solar radiation using mathematical model in the form of half-sine wave and practical measurements have been done using pyranometer. But, the readings given by the pyranometer depends on many climate conditions of a place. So, there are differences in the data of two cases. But, this study is useful to find the intensity of solar radiation of a place at different seasons at the particular latitude and longitude.