The invention discloses a temperature detection method and a mobile terminal. The temperature detection method is applied to the mobile terminal. The mobile terminal comprises an infrared thermal imager. The temperature detection method includes: S1, a thermogram of a face of a user is obtained by the infrared thermal imager; and S2, a temperature value of the face of the user is obtained based on the thermogram and then is outputted at the mobile terminal. According to the invention, the mobile terminal can detect the temperature of the human body and the privacy can be protected during temperature detection. Furthermore, the temperature obtained based on the temperature detection method and the mobile terminal becomes accurate.