The invention discloses a pedal standing position warning system and a walking device applying the system. The surface of the pedal is divided into a central safety zone and an external danger zone, and a safety zone pressure detection unit and a danger zone pressure detection unit are correspondingly arranged on the central safety zone and the external danger zone; the safety zone pressure detection unit and the danger zone pressure detection unit are composed of multiple safety zone pressure detection sensors and multiple danger zone pressure detection sensors respectively; the central safety zone and the external danger zone are each divided into multiple unit grids, and each pressure sensor in the corresponding pressure detection unit is arranged in the unit grid of the corresponding zone; and the safety zone pressure detection unit is connected with a safety zone pressure sensor counter, the danger zone pressure detection unit is connected with a danger zone pressure sensor counter, the safety zone pressure sensor counter and the danger zone pressure sensor counter are connected to a controller, and a warning module is further connected to the controller. By means of the pedal standing position warning system, whether an old man is located within a pedal safety area or not can be detected.