Natural gas is one of the most essential elements of our daily life. People have been using it for decades in an unorganized manner. Majority of the people in Bangladesh are not aware of the critical demand of energy. The amount of natural gas storage is inadequate and it is finishing quickly. In Bangladesh, natural gas is used for many purposes. One of the most important uses of natural gas is in the households for cooking purposes. The major issue is that in domestic cooking, wastage of gas is very common. Users sometime forget to stop the cooker after they are finished cooking, which causes wastage of natural gas. Domestic users of natural gas are not very serious about gas wastage. They are also not much aware of the consequences of wastage of natural gas. It is very difficult for the gas companies to monitor gas wastage and prevent it. It is necessary to monitor and prevent the wastage of gas that is used for cooking purposes. In this paper, development of a smart Internet of Things (IoT) based system to monitor and prevent household gas wastage is proposed. An IOT based gas wastage monitoring system has been developed. The system needs to be integrated with the cooker. There are sensors integrated with the system that will determine if the cooker is being used for cooking purpose. If it is found that the cooker is not in use, there is an automated switch off technique to turn off the supply of gas. The system also includes a cloud storage feature. With the help of this cloud storage system, the use of gas per day per user can be monitored. This process will help to detect the misuse of natural gas per user at the end of the day. The system has been tested and it is working well. In the future more features will be added to the system and will further help reduce the wastage of natural gas in Bangladesh.