Ergonomic exoskeleton is a human-centered wearable lower limb power assistance robot optimized with human body engineering design, perfectly fitting human leg curves, joint movement tracks and body force bearing distribution to deliver comfortable long-hour wearing experience. This ergonomic exoskeleton is equipped with AI real-time gait sensors and closed-loop adaptive servo drive system, which automatically judges flat ground, uphill, downhill and static standing states, dynamically adjusting targeted auxiliary torque for hip and knee joints to disperse body weight and carrying loads evenly across lower limbs. It greatly reduces concentrated pressure on thighs, calves and knee joints, alleviates cumulative muscle soreness and walking fatigue, and standardizes abnormal gait while maintaining natural bionic movement posture in daily travel, rehabilitation training and outdoor hiking. The whole frame adopts ultra-light high-toughness composite materials and streamlined ergonomic wrapping structure, with widened elastic soft padded straps that fit different leg shapes without local squeezing or friction redness, reaching IP54 dustproof and splash-proof grade to adapt to indoor and outdoor scenarios. Fully adjustable length and tightness fit users of diverse heights and leg circumferences, matched with lightweight swappable lithium batteries to support all-day continuous mobility support. Flexible bionic joint structure follows human natural bending range without restricting stepping, climbing and descending actions, paired with simple one-touch intelligent control suitable for seniors with weak leg strength, postoperative rehabilitation patients and outdoor field staff. Embedded anti-fall early warning, overload protection and emergency stop safety modules effectively avoid secondary injuries during long-time wearing. This human-friendly ergonomic exoskeleton achieves high-fit human-machine coordination, significantly improves long-distance walking comfort and extends continuous movement endurance while eliminating pressure marks and stuffiness caused by ill-fitting equipment.