Augmented　reality　(AR)　technology,　with　its　unique　immersive　interactive　experience　of　virtual　reality　integration,　can　show　children　abstract　concepts　and　theories　in　an　intuitive　way.　In　this　paper,　we　improve　the　high-precision　position　and　low　delay　interaction　of　AR　recognition　area　through　edge　calculation,　so　as　to　enhance　the　immersion　of　children＇s　chord　knowledge　learning.　Meanwhile,　multisource　fusion　perception　of　audio　and　touch　is　used,　and　the　AI　algorithm　model　is　used　to　monitor　physical　events　(cloud　AI　training　and　edge　execution)　and　effectively　realize　intelligent　services　such　as　chord　combination,　melody　perception,　and　control.　Chord　knowledge　in　music　theory　is　presented　to　children　through　multichannels　(kinesthetic,　visual,　auditory,　etc.)　situationally,　to　improve　children＇s　learning　efficiency　and　experience.　We　invited　12　children　to　participate　in　user　experiments　to　test　usability　of　ChordAR.　The　test　results　showed　that　children　can　master　the　method　of　playing　the　game　through　simple　learning,　ultimately　correctly　imitating　C,　G,　and　E　chords,　and　experience　full　immersion　in　the　game.　Finally,　we　discuss　the　positive　effects　of　ChordAR　on　children＇s　learning　and　creativity　and　make　suggestions　for　future　AR　games.　©　2022　Yi　Lu　et　al.