A multi-mode temperature measuring device includes a first case, a second case, an infrared (IR) sensing element and a wave-collection element. The first case has a measuring portion and an end portion. The measuring portion and the end portion are located at opposite side of the first case. The measuring portion has a first through hole. The first case is connected with the first case and can be rotated form a first position to a second position relating to the first case. The IR sensing element is disposed at the measuring portion and corresponding to the first through hole. The wave-collection element is disposed at the second case and has a second through hole. Wherein, when the second case is located at the first position, the second through hole is disposed opposite to the first through hole. When the second case is located at the second position, the second case is fixed at the end portion of the first case.一種多模式溫度量測裝置包括一第一殼體、一第二殼體、一紅外線感測元件以及一集波元件。第一殼體具有一量測部及一底部，量測部與底部位於第一殼體之相對兩側，量測部具有一第一通孔。第二殼體與第一殼體連接，並可相對於第一殼體由一第一位置旋轉至一第二位置。紅外線感測元件設置於量測部，並與第一通孔對應。集波元件設置於第二殼體，並具有一第二通孔，其中當第二殼體位於第一位置時，第二通孔與第一通孔相對設置，當第二殼體位於第二位置時，第二殼體固定於第一殼體之底部。
