After the thermometer is broken, the internal mercury will flow out, the speed of mercury volatilization and temperature, the higher the temperature, the faster the volatilization, in room temperature conditions generally eight hours to volatilize. Mercury evaporates into a gaseous state indoors, and after being inhaled, symptoms such as dizziness, headache, nausea and vomiting may occur. Mercury thermometer broken, in order to avoid causing poisoning, should open doors and windows, to maintain good ventilation; fall on the ground to collect the mercury ball, in the bottle, while paying attention to wear gloves, try not to let hands contact with mercury; but also with ferric chloride solution, bleach solution or sulfur powder to clean the ground; collected mercury, sent to the environmental protection department or chemical laboratory custody. Mercury thermometer broken, mercury spilled on the ground, take care not to wipe with a rag or mop, otherwise these mercury will remain on the rag or mop, in contact with other places, may cause pollution in other places.