A tool status display device includes a memory, a processor, and a display. The memory is configured to store first data that associates each attachment surfaces with each tools, and second data that identifies whether tool nose positions of noses of the tools have been measured. The processor is configured to determine whether designated tool among the plurality of tools is attached to designated attachment surface among the plurality of attachment surfaces based on the first data and third data that associates the designated tool with the designated attachment surface. The processor is configured to determine whether designated tool nose positions of the designated tool among the tool nose positions have been measured based on the third data and the second data. The display is configured to show whether the designated tool is attached to the designated attachment surface and whether the designated tool nose positions have been measured.