An apparatus for measuring a figure distance between first and second points of a solid figure with a measuring device having first and second panels and an axis connecting the panels is provided with a measuring device data storing section for storing attribute data and constitutional data of the measuring device, a solid figure data storing section for storing solid figure data, and a display section for displaying the measuring device and the solid figure according to the data stored in the storing sections, a moving section for positioning the first and second panels at the first and second points according to a motion mode, and a renewing section for renewing the data according to an editing mode. In the moving section, the axis is extended or shortened, translation movement is performed for the measuring device, and/or the panels is deformed in a stick shape according to the motion mode. In the renewing section, the measuring device is rotated or jointed to a second measuring device, one of the panels is overlapped with a surface or an edge of the solid figure, and/or the axis is curved to measure a curved outline length of the solid figure according to the editing mode.