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With the development of science, technology, and industrialization, scientific experiments are essential, and the construction of laboratories in various fields has been fully carried out. During the laboratory testing process, a large amount of harmful substances were generated, causing serious harm to the health of the testing personnel. The Fume hood is the main safety equipment in the laboratory, and most experiments are completed in the Fume hood. The Fume hood is a special form of the airtight hood, and the operation process of producing harmful substances is completely carried out inside the hood. Generally, the Fume hood is equipped with an openable operating hole and an observation hole. By drawing air from the Fume hood, a negative pressure is formed in the fume hood to prevent the overflow of harmful substances caused by the disturbance of mechanical equipment, chemical reaction or heat pressure of heat sources, and the interference of indoor transverse airflow in the Fume hood.