An exemplary atomizer includes a housing, a liquid chamber defined in the housing, a heating assembly in the housing, an air passage, and two electrodes. The liquid chamber is configured for storing tobacco liquid. The heating assembly includes a liquid conducting body and a heating element. The liquid conducting body is configured for absorbing the tobacco liquid from the liquid chamber. The heating element is in contact with the liquid conducting body. The heating element is configured for heating the tobacco liquid to form aerosol. The air passage allows the aerosol to flow out of the atomizer. The two electrodes are arranged at one end of the housing, and electrically connected to two opposite ends of the heating element. The atomizer further includes a temperature sensor configured for sensing a temperature of the heating assembly.
