Based　on　the　practice　in　interior　design　industry,　this　paper　studies　the　latest　development　of　computer　graphics　in　hardware,　software　and　algorithm.　With　the　study　on　realistic　image　generation　algorithm　of　computer　and　real-time　rendering　technology,　this　paper　uses　accelerator　engine　of　NVIDIA　company　including　ray　tracing　engine　OptiX,　scene　management　engine　SceniX　and　physical　engine　PhysX　to　design　a　GPU-based　real-time　rendering.　Then,　it　chooses　the　most　suitable　virtual　reality　technologies,　designs　an　interior　design　software　system　with　rapid　modeling　and　real-time　high　realism　roamed　function　and　realizes　the　design　development　of　system　prototype.　Finally,　we　take　one　home-engineering　as　an　example　to　test　the　effect　of　system　application,　compare　and　analyze　benefits　and　effects　which　are　brought　by　virtual　reality　technology.　©　2019　IEEE.