It　is　of　great　significance　to　discuss　the　interdisciplinary　phenomenon　and　its　regional　differences　for　a　comprehensive　insight　into　the　intersection　and　integration　of　disciplines　in　the　field　of　science　and　technology.　In　this　study,　based　on　the　text　information　of　the　National　Nature　Fund　Project,　the　corpus　is　constructed　by　using　keyword　information,　combined　with　TF-IDF　algorithm　to　improve　cosine　similarity,　and　a　region-specific　measurement　method　of　discipline　intersection　is　proposed.　Using　this　method,　the　interdisciplinary　difference　maps　of　this　discipline　among　provinces,　autonomous　regions　and　municipalities　directly　under　the　Central　Government　in　China　are　obtained,　and　the　interdisciplinary　and　regional　differences　in　this　field　are　analyzed.　The　results　show　that　management　science　has　small-world　characteristics,　and　there　are　great　differences　in　the　degree　of　discipline　intersection　among　different　regions,　which　verifies　the　effectiveness　of　the　construction　method　of　this　study.　©　2020　Published　under　licence　by　IOP　Publishing　Ltd.