Considering the peculiarity of poetry in which rhymes and rhythm are vital, I would like to divide the periods of Korean Poetry lyrics into five periods as follows according to the characters used in expression style and the methods of passing it down. 1. Oral tradition and Chinese Translation Period (From B.C. to A.D.5th Century): the period that Dongyee(東夷) tribe had moved toward warm South from Northeast Asia and had settled in Manchuria and Korean peninsular recorded through translating our lyrics into Chinese characters 2. Hangchal(鄕札) literate period (from 6th century to the early 12th century): the period in which Hangga(鄕歌) poetry thrived from Silla(新羅) dynasty when our language written by means of Hangchal characters to early Goryo(高麗) dynasty. 3. Sokakgasa(俗樂歌詞) Period (from the middle of 12th century to the early 15th century): the period headed by Cheong kwacheongkog(鄭瓜亭曲) in middle of 12th century, used in festival music, and delivered as the lyrics of Sokak(俗樂). 4. Humminjeongeum(訓民正音) Period (from the middle of 15th century to the late 19th century): the poriod when a lot of anthology and works such as Sijo (時調, three-verse Korean ode) and Gasa (歌辭, an old form of Korean verse) were published after King Sejong made Hangeul. 5. Hangeul(한글) Period (from 20th century to 21st century): the period when Hangeul has been used as an official language resulting in the decay of Chinese literature, and the popularized and commercialized period due to the independence of literature and music.