Abstract: In the late 16^th century, Tibetan medical schools which were based on Indian Ayurvedic medicine were spread in Mongolia when Buddhism was revived the third time in Mongolia. This was a brand new page in the history of the Mongolian health system. Monasteries were set up in every corner and larger monasteries had doctor’s schools to train tens of doctors. At the end of the 17^th century, Mongolian doctors, scholars started translating and explaining the fundamentals of Indian Ayurveda and Tibetan medicine and even established new branches (schools) blending the Tibetan theory and treatment methods with their empirical knowledge. Conclusion At that time, in the 18^th century, complete bases were established for the start of the golden period of Mongolian medical development which was characterized by theoretical and practical compliance with the “Four Medical Tantras”. Tens of books of this time were written in the Mongolian and Tibetan languages by Mongolian doctors and scholars alike. A new paradigm containing progress, unique opinions can be seen on pages of “The Mongolian Four Medical Tantras” written by Sumbe khamba Ishbaljor, and “Satisfaction for the Readers” or Uzegsdiin Bayasgalan by Jigmeddanzan jamts and “Secrets of Prescription Recipes” or Uvidasyn Dalai by Mindol Jambal. These scholars reflected new concepts that were not specifically clear in the Four Fundamentals such as warm and cold diseases, which were the basis to categorize cold and common diseases and treat them differently, and the theoretical and practical understanding of the categorization of infectious diseases, in their book.