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In daily life, the method of making staple food is nothing more than steaming, frying, boiling, roasting, and baking. The “roasting” of the staple food is not only used in the food and beverage industry, but also in the food processing industry. Toasted foods use ovens and charcoal ovens are almost extinct. The largest amount of gas ovens and fuel ovens currently used in restaurant kitchens and food factories are electric ovens. Compared with other ovens, electric ovens do not pollute the environment, are easy to install and use, and improve the working conditions of operators, and are therefore very popular. However, as an electrical product, if the electric oven is not properly installed, installed, or used, it will turn into an electric tiger, which may endanger the safety of personal and property. In recent years, malignant accidents such as electric shocks and fires caused by electric ovens have occurred from time to time.