the sole 100 the projections 700 may come in contact with the ground g at the positions corresponding to the mounting spaces 300 the mounting spaces 300 may be formed in along the width direction of the sole 100 the projections 700 corresponding to the mounting spaces 300 may be also formed in the width direction of the sole 100 as shown in fig7 the portions of the sole 100 where the mounting spaces 300 are formed in the sole 100 may be made of an elastic material particularly rubber the optical sensor 50 may be non contact type sensors fig8 is a view showing a robotic shoe according to an embodiment of the present inventive concept when the robotic shoe is not in contact with the ground fig9 is a view showing a robotic shoe according to an embodiment of the present inventive concept when the robotic shoe is in contact with the ground and the sequence of operation of the robotic shoe will be described first as shown in fig8 mounting spaces 300 may be formed in the sole 100 and the optical sensors 500 may be disposed on the top portions of the mounting spaces 300 respectively the top portions of the mounting spaces 300.