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 Laying Hens 4 a. 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 and number 96 a. for chicken eggs are food and water as normal By splitting into 2 trials the trial group. 12. repeat the experiment group, repeat figures 4 a. 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 metres 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 metres the temperature is in the range of 26-32° c.