Evaporative Air Conditioning System produces effective cooling by combining natural process water evaporation with air moving system. The Air Conditioning System lowers the fresh air temperature by 5 degree C to 20 degree C. The Air Conditioning System filters the fresh outside air through the saturated evaporative media and cools it by evaporation and circulated by a suitably sized blower. Evaporative Air Conditioning System is provided with duct and supply air grill to facilitate ease of operation.