we know that automatic system and automation is the requirement of today’s technology. We are moving toward automation day after day. It is one of the tending topic. So in this project I will provide this function: Arduino Uno senses the temperature and control the speed with the set temperature. This is set by the user. When the current temperature is greater than or equal to the set temperature the fan turned on otherwise it will stay off. For turning on here should be two condition supposed to be true. One is object detection and other one is temperature should be appearing at set temperature. After turning on the fan speed will be change accordingly with temperature. Whenever the temperature will be increase fan speed will be increase. This paper presentation will present the whole working process of the system. There are six portions in this paper. Introduction part has detail introducing of the project, objective of the system, justification to make the project and about the scope of the project. Literature review has some review about the relevant project in our society . Methodology has detail description about the workflow which I used during the time of project completion. i gave here the justification of using the workflow as well. I think about hardware requirement, Software requirement, and block diagram, description of the component used in the project and about the flow chart. And described why this project will matter to the user. I also think that how much effective of my project in practical life. In the conclusion I will give some statement about the limitations and the scope of future enhancement of the project.