In Korea, traditional species of Neunggeum have been cultivated since ancient times, and it is the first record that it is described as "King" in the "鷄 類" written during the Goryeo Dynasty (1083-1105). "King" is the etymology of Neunggeum, and the cultivation method is included in Hong Man-seon (洪萬選)'s "Forest Economy" written in the Joseon Dynasty, indicating that cultivation was popular in the early 18th century. Around 1884, missionaries brought in foreign varieties and planted them with ornamental trees, and in 1901, Yoon Byeong-soo (尹秉秀) made fruit trees near Wonsan to cultivate Gukgwang and Hongok. In 1906, the Ministry of Agriculture, Industry and Commerce set up a horticultural model farm on Ttukseom Island to introduce fruit varieties of each country, compare varieties, and conduct cultivation tests to establish the basis for fruit cultivation. In 1958, a horticultural test site was established to begin research in earnest, and in late 1991, an fruit tree research institute was separated from the horticultural test site and a Daegu apple research institute was established to be in charge of apple research. Apples are divided into early, middle, and late-growing species depending on the harvest period. Early-growing species, which are the most mature harvest before late August, include Mi-gwang, Jo-hong, Seo-hong, and Tsugaru (Aori), while mid-growing species, which are the most mature harvest from early September to mid-October, include Hong-ro, Hong-wol, Yang-gwang, Chu-gwang, Golden Delicious, World Il, Jonagold, and Shinano Sweet. Many kinds of late October are Fuji (Busa), Hong-ok, Gam-hong, and Hwahong. It is an alkaline food, low in calories and contains many good ingredients for the body. Dietary fiber prevents arteriosclerosis by releasing harmful cholesterol accumulated in blood vessels and increasing beneficial cholesterol. Potassium also helps prevent and treat high blood pressure by releasing salt in the body. Pectin, a water-soluble dietary fiber, also increases the viscosity of gastric juice and releases malignant cholesterol to suppress a rapid increase in blood pressure, and phenolic acid prevents stroke by neutralizing unstable harmful oxygen in the body. Kecetin contained in apples strengthens the lung function and protects the lungs from tobacco smoke and pollutants. It also contains a large amount of organic acid that removes fatigue substances and vitamin C that is good for skin beauty. Apples' pulp is good for gum health, and apple acid has the effect of reducing shoulder stiffness. Apple vinegar is used to treat burns and bumps. Eat raw, or jam, juice, cider, alcohol, vinegar, pie, tart, jelly, mousse, and sherbet. In Europe, sausage or meat dishes are fried with apple or apple sauce, and when making curry or stew, or jelly or mousse with citrus fruits, apple juice is added to enhance the taste and aroma. If you peel and place it in the air, the flesh turns brown. To prevent this, put 1g of salt in 1 liter of water and soak it in salt water made from it.