An exoskeleton is a wearable bionic mechanical device worn outside the human body, designed to assist physical labor or support medical rehabilitation. It is generally categorized into passive and active powered versions to suit diverse working and therapeutic scenarios. Manufactured from lightweight yet rigid carbon fiber and aviation aluminum alloy, an exoskeleton features adjustable joints and flexible binding belts to fit different body shapes without hindering normal limb movements. A passive exoskeleton relies on elastic structures and mechanical leverage to transfer part of the load from the waist, back and knees to the ground during lifting, bending and prolonged standing, significantly easing muscle fatigue and reducing occupational strain in logistics, construction and factories. A powered exoskeleton is integrated with high-precision sensors, servo drives and intelligent control modules. It captures movement intentions in real time, enabling patients with paraplegia, hemiplegia or lower limb weakness to perform safe standing and gait training, preventing complications like muscle atrophy and joint contracture. Equipped with anti-fall protection, emergency stop and overload lock functions, an exoskeleton guarantees operational safety. With continuous technological iteration, an exoskeleton has evolved into practical smart equipment that safeguards workers’ health and helps mobility-impaired people restore independence and self-confidence.