This study investigates experimentally, the effect of direct and indirect evaporative system on the temperature and relative humidity distribution inside a greenhouse. Experimental tests on a full-scale greenhouse of sizes 0.9 m x 0.55 m x 2.4 m (W x H X L) were conducted in October 6 University, 6 October city, Giza, Egypt at summer rush hours were used to obtain spatial distribution of air-temperature. Measurements of temperature distributions at about 63 points inside the greenhouse. One of the main conclusions is that experimental results were preserve the temperature variation below 30 ^оC during the day rush hours, especially in the area designated for the growth of plants inside the greenhouse. Keywords: Greenhouse; direct evaporative cooling; indirect evaporative cooling.