Inspired　by　the　three-dimensional　design　of　flow　passages　in　turbomachinery,this　study　proposes　the　concept　of　integrated　passage　design.The　capability　of　adjoint　method　for　efficient　optimization　and　the　flexibility　of　the　parameterization　method　based　on　extended　free-form　defor-mation　have　been　considered　to　develop　a　feasible　approach　to　design　an　integrated　passage.This　concept　was　applied　to　redesign　a　typical　transonic　fan,Rotor　67,and　the　results　were　analyzed　by　CFX.It　is　shown　that　the　passage　was　adequately　adjusted　in　all　three　dimensions　and　reduced　the　strength　of　shock　wave　and　wake-induced　flow.In　particular,the　secondary　flow　was　appropriately　reorganized　and　the　corner　separation　was　well　controlled　in　the　end　wall　region,leading　to　signif-icant　improvements　in　adiabatic　efficiency　and　diffusion.