FREE WALK can facilitate therapists to assist patients with lower body paralysis/weakness due to stroke or spinal injury to exercise, sit, stand, walk, etc. This technology allows all training processes and records to be uploaded to the cloud. The rehabilitation effects are clearly visible and medical staff can easily grasp the patient's status. Help them improve their lower limb mobility from standing to walking, provide them with the ability to move again, avoid their lower body muscle atrophy, and improve their cardiopulmonary function and physical health. For patients with limb weakness caused by nerve damage, FREE WALK can help patients learn correct walking habits and improve the quality of their activities through different parameter settings.