The bilingual text-mining system is developed and implemented to address the educational goal in the 21st century for learners’ active, constructive and interactive learning of domain knowledge in technology-enhanced environments. The system adopts the bilingual text-mining technique for analyzing learner-generated text on the learning management systems. It incorporates a bilingual taxonomy of domain-specific keywords for an automatic identification and counting of matching keywords in learner-generated text, and provides hierarchical visualization for an informative and interactive display of counting results of matching keywords.