The utility model discloses a but cable head temperature measurement box device cabinet door improves structure, including the cabinet door, be equipped with the temperature measurement opening on the cabinet door, infrared transmitting glass is equipped with on the temperature measurement opening, be equipped with protection panel in the temperature measurement open -ended outside, protection panel swing joint on the cabinet door, and can stir or rotate by edge hookup location. The utility model discloses add a temperature measurement opening on the cabinet door of current looped netowrk cabinet to adopt infrared transmitting glass to seal it, such structure can be through the temperature measurement opening inside circumstances of observing the looped netowrk cabinet directly perceived under the prerequisite of not opening the cabinet door, accessible instrument check to the temperature of cable head and annex again, and the enclosed construction has also been guaranteed to observe and the security of measuring in addition, and protection panel has set up the security of structure further perfect.