Flexible exoskeleton system is a human-adaptive wearable lower limb mobility solution built with soft composite flexible materials and bionic flexible joint structures, breaking the rigid frame limitation of traditional exoskeletons to deliver unrestricted natural leg movement. This flexible exoskeleton system integrates mini AI gait sensing modules and low-power adaptive drive units, which real-time monitor joint angles, walking posture and terrain gradient, then output soft, follow-up auxiliary power to hip and knee joints according to each movement cycle. It evenly shares body weight and backpack loads, relieves persistent muscle strain and knee joint pressure during daily walking, rehabilitation training and outdoor hiking, and naturally rectifies irregular gait without restraining body bending, squatting, climbing or downhill motions. The lightweight flexible main body can fit closely to leg contours without bulky hard structures, supporting quick donning and folding storage, and reaches IP54 dustproof and splash-proof rating to adapt to indoor and outdoor all-weather scenarios. Fully adjustable elastic soft wrapping straps suit users of various heights and leg circumferences, paired with slim detachable lithium batteries to offer all-day uninterrupted assistance without heavy burden. The human-centered flexible linkage design perfectly matches human natural movement tracks, equipped with simple one-touch intelligent control suitable for elderly users with weak leg strength, post-injury rehabilitation patients and outdoor field staff. Embedded anti-fall early warning, overload protection and emergency stop safety modules effectively avoid slips and secondary injuries on uneven ground. This all-scenario flexible exoskeleton system achieves ultra-smooth human-machine synergy, greatly improves long-time wearing comfort and extends continuous mobility endurance while retaining outstanding flexibility and fitting performance.