The europium ternary solid complex containing p-nitrophenylacetic acid and 1, 10-phenanthroline was synthesized in this work, and the chemical formula of this compound was determined to be EuL3 phen by elemental analysis. The complex has been characterized by analysis of molar conductivity, TG-DTA, IR and UV. The fluorescence spectra of this Eu3+ complex has been investigated also in this paper.