If it is the mercury end of the thermometer broken, that is, the mercury ball broken, this situation to bring down the temperature of the room to prevent the broken mercury at room temperature in the room volatilization. If the mercury is dropped on the ground, the ground is smooth tile, you can use paper shells or printer paper to scattered mercury beads on the ground together, scraping from the outer perimeter to the middle, so you can see the small mercury beads gradually converge into a large mercury ball, and then gently shovel them up to store in an airtight plastic bag. If the mercury beads are scattered on the ground, desktop, rough plane, or on the bed, carpet, you can use tape to stick these small mercury balls together, and then sealed together in a tightly closed plastic bag, which can prevent the leakage of mercury. The collected mercury should be handed over to the local environmental protection department as much as possible, as medical waste to be disposed of, and in addition to open the windows of their rooms in time to ventilate.