A new europium(III) complex [Eu₂(C₁₄H₉O₃)₆(2,2΄-bipy)₂]·(2,2΄-bipy)₂ has been synthesized with 2-benzoylbenzoic acid and 2,2΄-bipyridine as ligands. Crystal data: triclinic, space group P, with a = 13.5251(5), b = 13.9453(5), c = 15.3582(5) Å, α = 76.922(3)º, β = 79.740(3)º, γ = 64.248(4)º, V = 2530.83(18) ų, D_c = 1.496 g/cm³, Z = 1, μ(MoKα) = 1.305 mm^-1, F(000) = 1156, the final R = 0.0340 and wR = 0.0638. The Eu(III) ion is coordinated by eight atoms to give a distorted square antiprism coordination geometry. The complex exhibits antiferromagnetism in the temperature range of 300～2 K, and two intense fluorescence emission bands arising from the transitions of Eu³⁺: ⁵D₀ → ⁷F₁ (595 nm) and ⁵D₀ → ⁷F₂ (618 nm), respectively. In addition, the fluorescence sensing properties of the complex in CrO₄^2- solution were studied.