This work was performed using computational approach to simulate the effect of solar irradiation on the greenhouse effect in a close greenhouse. The simulation results were compared with the field measurements to validate the feasibility and correctness of using the Discrete Ordinates Radiation Model in studying the heating effect in the greenhouse. Based on the comparison between the field measurements and computational results, the maximum relative error for temperature was 1.46% and was located on the floor in the greenhouse. On the hand, the minimum relative error for temperature was located on the water wall and it was 0.06%. Also found that accumulation of heat energy obviously took place at the upper corner and the regions close to the greenhouse roof. This phenomenon could be identified for the temperatures at these regions were apparently greater than the temperatures at rest of the greenhouse interior.