Objective : Processing of medicinals are one of the most important part in medicinal treatment. However, in text books, there are disagreements and several terms with same meanings. Method : We tried to compare the processing of medicinals in text book, Bonchohak especially in exterior-releasing medicinal and heat-clearing medicinal. Results : The terms of processing of medicinals in introductions of text book, Bonchohak are different from those in an itemized discussion of exterior-releasing medicinal and heat-clearing medicinal. Conclusion : The terms of processing of medicinals in text book, Bonchohak should be reorganized and improved to make be clear and sure as a text book.