The Study is aimed at controlling the speed of the fan automatically using Arduino, temperature and humidity sensors. Fan speed need to be manually controlled every time but by using this idea the speed of the fan will be automatically adjusted according to surrounding environment. The project is based on the concept of Internet of Things(IOT). A simple strategy to automatically control the speed of fan using DHT22 sensor. According to the temperature sensed by temperature and humidity sensor the resistance of the fan will be adjusted to change the fan speed. It’s fairly straightforward to use, however needs careful arrangement to grab information. DHT22, Arduino and LCD will get power from the same fan connection, so that less battery power is used. The temperature will automatically control. In the proposed system Fan can be set at rather high for lowered activity level that required limited body movement like sleeping and sitting. DHT22 sensor is used to sense the temperature and then speed of fan is adjusted accordingly using PWM. Here Arduino code is used. In this proposed system, it takes comparatively less time to process. It requires additional devices, external clock and for programming it requires development system.