Aimed　at　the　comprehensibility,　reusability　and　maintainability,　the　thesis　presents　the　reverse　model　recovery　for　the　legacy　code　developed　by　TTCN-3.　It　can　also　help　tester　and　maintainers　to　verify　the　test　implement,　etc.　The　thesis　introduces　the　discovery　of　invocation　model　and　dynamic　test　configuration　model　based　on　the　reverse　model　discovery　system　framework.　©　2011　IEEE.