Internet of Thing technology is known for its capability to collect and store a massive amount of data for further research development. Researcher widely utilizes this technology as it has become a very convenient tool with a cost-effective advantage. Practically, the calculation is made before determining the best cooling device for every room with temperature, humidity and power consumption being an important element to be taken into account. This paper present the practical approach to acquire data using WSN and IoT technology which then lead to the development of fuzzy logic control of the air conditioner with the aim to reduce its overall power consumption. Classroom equipped with two non-inverter air-conditioners with 4HP each used as a testbed.