The present invention provides a reflection cover and a temperature measurement device. The reflection cover includes a hollow joint unit, a hollow guide unit and a hollow receive unit. One end of the hollow joint unit has a stationary part, and the stationary part is detachably connected to a detection part of a measurement device. One end of the hollow guide unit is connected to the other end of the hollow joint unit, and an internal wall of the hollow guide unit has a first reflection surface and a second reflection surface, in which the first reflection surface and the second reflection surface correspond to each other. One end of the hollow receive unit is connected to the other end of the hollow guide unit. At least one light source enters the hollow guide unit through the other end of the hollow receive unit, and the at least one light source is transmitted to the detection part through the reflection of the first reflection surface and the second reflection surface.本發明揭露一種反射罩體及溫度量測裝置，反射罩體包括一中空接合單元、一中空導引單元與一中空接收單元。中空接合單元的一端具有一固定部，固定部可拆卸地接合於一量測器的一檢測部。中空導引單元的一端連接於中空接合單元的另一端，中空導引單元的內壁具有相對應的一第一反射面與一第二反射面。中空接收單元的一端連接於中空導引單元的另一端。至少一光源從中空接收單元的另一端進入中空導引單元，且至少一光源通過第一反射面與第二反射面的反射而傳送到檢測部。
