The present invention relates to an antioxidant, anti-inflammatory or anti-aging composition containing any one or more of a Taxus cambium- or procambium-derived cell line, an extract thereof, a lysate thereof and a culture medium thereof. The composition according to the present invention has minimized side effects compared to existing antioxidants and anti-inflammatory agents, is involved in intracellular metabolism to reduce intracellular reactive oxygen species, and reduces and induces aging-related signals. Thus, the composition of the preset invention is useful for preventing and delaying aging. In addition, the composition of the present invention has the effect of inhibiting melanogenesis, and thus is useful as a whitening cosmetic composition.