Because there are mercury ions in the thermometer, so if the thermometer is broken, it needs to be treated strictly as follows: 1, mercury has strong volatility, so it should not be blown into the air with a vacuum cleaner, which will accelerate the volatilization of mercury, and also make mercury everywhere, which is more difficult to clean up, so clean up with rubber gloves or medical gloves, so as not to cut your fingers. 2, use paper towels to organize those broken pieces of glass first, and seal the bag and collect them. 3, for larger mercury particles, they should be collected with cardboard carefully one by one, and after collection, the mercury particles should be put in a flat bag. Those broken pieces of glass first to organize, and sealed bags and collected. 3, for the larger particles of mercury, should be carefully collected with cardboard, one by one, after the collection of mercury particles should be wrapped in a smooth floor, wrapped in a small paper circle and then sealed, sealed in an airtight plastic bag is the most secure.