For the purpose of developing Korean Herbalogy with the plants of Moraceae which grow wild and is planted in Korea, the these and writings on herbalogy, from literature of successive generations, have been thoroughly investigative and the results obtained were as follows : 1. There were totaled to 5 genera and 33 species in Korea and among them medicinal plants are 5 genera, 26 species, some 75% in total, but the number of species may be added because of the similiar plants. 2. According to the oriental names which can be used for medical purpose, the medicinal plants belonging to the Moraceae family were classified as Foilum 24, Radix 21, Fructus 21, Cortex 16, Semen 15, Lignum 15, Wooden 1. Thus it was noticed that the Foilum was main kind. 3. According to sum of 23 species in Moraceae family, they were classified into Fiaus genera 15, Morus genera 11, Broussonetia genera 5, Cudrania and Fatoua genera 1 each. Thus it was noticed that Ficus genera was the main kind, some 65% in total. 4. According to nature and flavour of medicinal plants, they were classified into cold, cool; 14 each, balance 13 warmth, heat ; 6 each, and unidentified 4. Thus it was noticed that cold, cool is the main in nature and flavour of medicinal plants. 5. According to the Properties and Principal curative action, they were classified into drugs for clearning up heat and removing heat from the blood 11, drugs for expelling wind and circulating blood 11, drugs for inducing diuresis 10, drugs for strengthening the spleen and stomach 6, drugs for alleviate edema 5, drugs for releving cough and reducing sputum 4, drugs for improving acuity of vision 3. Thus it was noticed that Drugs for clearing up heat and removing heat from the blood was the main kind. 6. Comparing to whold medicinal plants 26 kinds, toxic drugs include minor toxin was 1 kind. Thus toxic drugs were rate. From this result, It was revealed that the plants for medical purpose in Moraceae was 75% kinds of the whole, in FOILUM and RADIX were abundunt, toxic plants were so rare that it will be used for clinical treatments more easily. It is considered that may clinical experiments and approaches must be continued to use Moraceae plants widely.