Our　society　is　transforming　into　more　intelligent　eco-systems　that　seamlessly　merge　human　beings,machines,the　internet,and　energy.The　unprecedented　momentum　in　such　dramatic　transformation　inevitably　relies　on　innovation　in　smarter　materials.Flexible　intelligent　materials　are　eagerly　demanded　in　such　evolution.Flexible　intelligent　materials　are　soft　materials　whose　properties　can　be　altered　by　external　stimuli,such　as　chemicals,mechanical　forces,temperature,light,humidity,pH,and　electric　or　magnetic　fields.The　mechanical　flexibility　enables　the　adaptability　to　directly　interface　with　human　beings,while　various　responsiveness　to　different　stimuli　provides　a　rich　recipe　for　constructing　different　intelligent　systems.Recently,flexible　intelligent　materials　have　been　applied　in　diverse　inter-disciplinary　fields　such　as　flexible　and　wearable　electronics,smart　sensing,human-machine　interfaces,soft　robotics,drug　delivery,information　security,energy　storage,etc.To　show　the　leading-edge　research　in　the　field　of　flexible　intelligent　materials,a　special　issue　entitled　Flexible　Intelligent　Materials　has　been　organized　by　Science　China　Materials,including　high-quality　reviews　and　research　articles　from　this　emerging　and　inter-disciplinary　field.