ICA3D　is　an　implemented　computer　aided　system　that　helps　user　design　ancient　Chinese　architecture.　With　ICA3D,　the　user　can　describe　the　building　he/she　wants　to　see　in　a　domain　specific　Chinese　natural　language,　and　the　system　automatically　generates　an　animation　demonstrating　the　construction　process　of　this　building　from　scratch.　This　whole　text-to-scene　conversion　is　supported　by　a　set　of　knowledge　bases　implemented　by　the　Semantic　Web　technologies.　Currently,　ICA3D　covers　more　than　180　different　types　of　Chinese　traditional　buildings.　Compared　with　normal　CAD　systems,　ICA3D　features　the　automatic　generation　of　animation,　natural　language　style　user　interface,　and　scalable　knowledge　infrastructure.