This Essay is a comparative study of French feminism and Ecofeminism with Yimyunzydang`s thought from the Yi dynasty in Korea. First, I will survey feminist theories from postmodern feminism (or French feminism) to Ecofeminism and compare them with Yimyunzydang`s philosophy. In France, during the 1960s and 1970s, some French feminists, such as H??l??ne Cixous, Julia Kristeva and Luce Irigaray, developed a system of analysis which was radically different to that which had been practiced in the UK and USA. For Kristeva, the suppressed feminine emerges in both men`s and women`s writings of the modernist avant-garde, which by concentrating on language shows subjectivity in the process of construction. For Irigaray and Cixous, writing `woman` is a more utopian quest which has not yet been written. These women use the sophisticated verbal and philosophical deconstructions of Lacan and Derrida in order to destabilise the notion of gender positions within texts. In the 1990s Ecofeminism or genoecology has come out with Deep Ecology. Ecofeminism regards nature as mother/woman which should be taken care of and also maintains that every living thing is equal to one another in their Nature. Men and women have no difference in quality but only difference in their role in society. So human beings should take care of and be reconciled with everything in the world. The Korean woman Yimyunzydang in the Yi dynasty also claimed that men and women have the same quality in original nature and they are a part of the nature. So humans should follow the rule of nature like the other things in the nature and should live according to the order of the nature. She also persists everything in the world should interact peacefully together. The maintaing of Ecofeminism presents similaries to Yimyunzydang`s philosophy written 200 years ago in Korea.