This article aims to study the thermodynamics analysis of the performance design of pneumatic induction air-cooler with opposite and unopposed flow using the material and energy balance of the cooling tower system according to the flow rate of water/air entering and exiting the tower and assessing operational conditions and environmental factors affecting the performance of the cooling tower work and the importance of treatment Cooling water. So that, The mechanics of the work of the air-cooling towers are unique in that they use the principle of evaporative cooling in addition to heat transfers and mass transfers. This type of cooling is called humidification. Therefore, The air-cooler equipment is used in industrial processes as heat fluids with a high thermal capacity which is mostly (water/air). The Equipment as fans use air but, Heat exchangers use the fluid, which is separated from the product by barriers in single track systems. Hot water cannot be reused but, Put it out naturally in seas and rivers, and this process is costly and not economical. However, This study showed through the results of the thermodynamics analysis of the performance of the design of cooling towers, that the higher (water/air) temperature entering in tower, the lower performance rate of the cooling tower and this is due to the type of cooling tower fillings and the ratio of the ph of the water entering the tower and the rate of thermal evaporation of the air-cooling tower