As Toegye(退溪) Lee Hwang(李滉: 1501～1570) was the moralist in Chosun Age, his life is recorded in the chronological record and necrology in details. Since his learning attitude, educational method, practicing etiquette, friendship between instructor and disciples are well written in the memoirs recorded by his disciples, it may be needless to mention his academic dissertation. Writing 2330 poems, Lee Hwang is a moralist and poet. Included in the anthology, these poems are quite diverse in their types. They are diverse in forms, contents and topics. They are mainly composed of materials poem(詠物詩), Japanese apricot poem (梅花詩), poem that recites reason(說理詩), response poem(和答詩), extempore poem(卽事詩), poem that recites inmost thoughts(詠懷詩). poem attached to picture (題畵 詩), poem mourning death(輓詩), poem in which 1 line is composed of 4 letters (四言詩), poem in which 1 line is composed of 6 letters(六言詩), poem that recites dream(醉夢詩), social poem(社會詩) , poem of concerned country(憂國詩), that recites historical poem(詠史詩), journey poem(紀行詩), song poem (樂府詩) are also important in overall poems, although they are partial. Due to the diverse types, the research has been so diverse thus far. The origin and background of these poems are the thought of ethics. Thus, the poems of Lee Hwang keep the ethical character. Owing to ethical character, they show less inspiration and romantic aspect. Instead, they emphasize morals, science, mind purification and ethics, combining gaining knowledge by the study of things to the works. Lee Hwang himself said “As my poems are stern and lofty, people do not like them .”Thus, he did not want to only pursue what people liked, namely, their interest and enjoyment. Reading the poems written by disciples, he said that poems without morals and science were not good poems in spite of beautiful expression and distinguished thought. When composing Japanese apricot poem, materials poem, thoughts poem, Lee Hwang recited his own feeling without intention to form ethical factor. However, the ethical factor was naturally reflected together in many examples. The aspect varies in each work. The concentration of implied ethics varies, depending on the materials or theme. It is deep in the poem that recites the theme of practicing ethics or that clarifies the principle of materials. On the contrary, it is shallow in the objective poem such as journey poem or historical poem. In the works written to poetically describe the ethical factor, the words or phrases of sages were utilized as poetic words. This utilization and the poetic shape will enable readers to understand the meaning of poem broadly and deeply.