When grilling, add half of the ignited and half of the unburned charcoal. When you need to add fire, you only need to add raw carbon. According to the experiment, you can save about 60% of charcoal. It is simple, quick, saves time and effort, and has low cost and is easy to be demolished. Easy to install and easy to use, you can move the desktop as you like. The internal device is not easily damaged. There is no need to install the exhaust pipe inside the air purification system. Simply install the oven on the fireproof desktop to connect the power supply, which reduces the cost of facilities and maintenance. Because the meat will not stick to the baking tray. Therefore, it is not necessary to change the baking tray frequently, the exhaust pipe is in the clear place, and the cleaning and maintenance is convenient and simple.