α-N-(S-1-phenylethyl)-β-(4’-methoxyl)benzoyl-L-alanine had been synthesized by combination of Friedal-Craft reaction and stereo-selective Michael reaction.The structure was confirmed by 1H NMR,13C NMR and X-Ray single crystal diffraction.The steady-state fluorescence property of the title compound was also investigated.It was found that the maximum emission wavelength was longer and the quantum yield was less in solvents with larger dielectric constant.The title compound displayed recognition ability to environmental state.