This paper purposes the study of Internet of Things (IOT) based home automation system. Internet of things(IOT) based home automation system can be controlled over mobile devices. This system can perform varied functions to be performed at home. This allows accessibility over internet from any corner in the world. The main focus of this project is to minimize the usage of electricity and reduce human efforts.The Home Automation system (HAS) incorporates various aspects of technologies such as wireless networking, communication over cloud.The data to be analyzed is stored onto the cloud. The user can access multiple appliances over the internet as per their convenience. This is a low cost system. This system can control multiple devices