An information processing device is an information processing device configured to be used in a processing system including a processing device configured to perform predetermined processing on a three-dimensional processing target, the information processing device including: a control section configured to acquire 3D data of the processing target; display the processing target on a three-dimensional object display screen in a three-dimensional shape, being capable of being moved, rotated, scaled up, and scaled down, based on the acquired 3D data; acquire designation information of a position on a surface of the processing target; and output positional inclination information based on the 3D data, the positional inclination information including information relating to a coordinate of the position and an inclination of the surface of the processing target corresponding to the acquired designation information.