The　traditional　nose　implant　is　based　on　experience　and　handicraft　of　surgeons,　which　can＇t　correspond　exactly　to　patient＇s　bone　feature　and　perfectly　enhance　patient＇s　appearance.　This　paper　introduces　a　three-dimensional　design　system　of　digital　implant.　In　this　system,　image　segmentation　and　gray　expanding　were　employed　to　reconstruct　modal　of　nasal　bone　and　akin　from　patent＇s　CT　image.　3-D　morphing　and　quantitative　measurement　were　applied　to　reshape　the　nose,　according　to　the　patient＇s　expectation.　Through　calculating　the　difference　between　original　and　reshaped　nose,　and　analyzing　thickness　of　soft　tissue,　3-D　digital　nose　implant　could　be　generated.　The　system　enhances　surgeon-patient　communication　and　the　clinical　results　match　with　the　simulations.　So　the　application　of　digital　implant　to　actual　clinic　shows　the　system＇s　efficiency　and　practicability.