In　order　to　improve　the　readability　of　scene,　this　paper　presents　a　method　of　dynamic　labeling　of　buildings　in　3D　virtual　city.　This　method,　based　on　3D　buildings　model,　sets　up　candidate　positions　for　labeling　first,　and　then　computes　the　visibility　of　the　samples　in　the　candidates　and　comprehensive　evaluation　in　real　time,　finally　embeds　labels　in　the　optimal　positions.　The　results　show　that　the　method　effectively　improves　the　scenes　readability　in　3D　city　models,　and　achieve　real-time　and　aesthetic　requirements.　©　2012　IEEE.