The invention discloses a temperature measuring mechanism below a movable glass plate. The temperature measuring mechanism comprises a base, wherein parallel walking guide rails are arranged on the base; a walking trolley is arranged on the walking guide rails; a baffle plate is arranged at the front end of the walking trolley; a push-pull handle which is opposite to the baffle plate is arranged at the tail end of the walking trolley; an infrared temperature measuring instrument is arranged on the upper end face of the walking trolley; one side wall of the walking trolley is provided with a gauge; the zero position of the gauge is flush with the front end of the walking trolley; the gauge is longer than the tail end of the walking trolley, and a surpassing portion is suspended in the air. The temperature measuring mechanism directly enters a kiln body through an observing port by using the own characteristics of annealing kiln equipment to directly aim at a glass plate surface at a near distance, thereby realizing accurate measurement of the temperature and measurement of the temperature of any region in the annealing kiln; the position of a measuring point on the glass plate surface can be positioned accurately by using the gauge, thereby realizing movable, accurate, multi-channel and multi-point temperature measurement.