Disclosed are a mouthpiece, and an atomizing device comprising the mouthpiece, the mouthpiece comprising: an upper cover body； a sensor assembly； and a base, wherein both the upper cover body and the base are hollow structures which open at both ends； the upper cover body is sleeved on one end of the base； an inner surface of the upper cover body and an inner surface of the base jointly define an inner cavity of the mouthpiece； the sensor assembly is fixed in the inner cavity of the mouthpiece； an air passage gap is formed in the inner cavity of the mouthpiece； and the sensor assembly includes at least one sensor that functions to detect the temperature or humidity or both of the smoke. The disclosed mouthpiece can detect the temperature and/or humidity of the smoke in real time.
