To　search　for　an　alternative　for　Nd2Fe14B,　we　have　studied　the　electronic　structures　of　R2M14B　compounds,　where　R　stands　for　rare-earth　element　and　M　for　Mn,Fe,　Co　and　Ni.　By　density　functional　theory　(DFT),　we　discuss　the　atomic　coordination　environment　and　partial　density　of　states　(PDOS)　in　detail,　with　the　emphasis　on　the　interaction　between　six　kinds　of　M　sites　and　the　R　atoms.　We　systemically　calculated　the　electronic　structure　of　sixty　R2M14B　compounds　to　provide　systematic　and　reliable　results　for　explaining　the　origination　of　magnetism,　which　is　important　for　further　development　of　Nd2Fe14B　based　magnet　materials.