The study is intended to study the difference of Temperature on the Productive Performance and certain Physiological Parameters in Laying Hens under Evaporation Cooling System size 12 × 80 m. Chicken cage in size 40 × 40 × 30 cm. Per four layer Duration of trial performed all over a period of 8 weeks. using the t-test method (statistic of a statistical hypothesis test value-test) try using egg chicken breed of lohmann hisex. female old 51 week. ninert-six layer for chicken eggs are food and water as normal. by splitting into 2 group. 12 Repeat the experiment group, repeat figures four layer by each group of laying Hens live in environment of different temperature, the experimental group 1 chicken eggs raised in Chicken cage in front Distances from the cooling pad 3.2 m. the temperature is in the range of 23-27 °C. the experimental group 2 chicken eggs raised in Chicken cage in at the end of Distances from the cooling pad 3 m. the temperature is in the range of 26-32 °C. The results showed that the difference of temperature does not affect the efficient use of feed per 1 kg, Egg production , Haugh units, color of yolk, The thickness of the shell, The mortality rate, Body temperature, Respiratory rate and ratio heterophil to lymphocyte ratio (P>0.05), But affect intake. Average egg weight (p