The present invention relates to a peptide for promoting bone formation or inhibiting bone resorption and use thereof. The peptide for regulating bone formation or bone resorption of the present invention has the effect of promoting bone formation by enhancing osteoblast differentiation and concurrently inhibiting bone resorption by restricting osteoclast differentiation and resorptive function. Additionally, due to the low molecular weight, the peptide can be economically produced, and is thus useful for preventing and treating bone diseases.