Though Sylvia Plath is often known as a “confessional”poet, her other literary abilities as a novelist, short story writer and diarist cannot be overlooked. In her short life, Plath used writing as a method of depicting life, an outlet to express herself, a way to establish her own identity and a weapon to challenge patriarchal society. Plath’s writings were influenced by many writers, but in hesitation, confusion and fear as well as exploration, she gradually formed her own distinct philosophy in poetry, short story and novel creation, which has been recorded in detail in her journals. Based on an interpretation of The Journals of Sylvia Plath and her representative works, the essay studies her philosophy of composition.