An information processing device according to the present invention includes: a numerical data storage unit which stores numerical data related to control or operation of a machine tool that numerically controls a drive axis at every time; an audiovisual information storage unit which stores audiovisual information acquired in the machine tool; and an output control unit which causes the audiovisual information stored in the audiovisual information storage unit to be outputted, while simultaneously causing the numerical data of the time at which acquiring the audiovisual information being outputted to be displayed from among the numerical data stored in the numerical data storage unit.