A new compound based on Anderson-type polyoxometalate, [Cu(phen)H2O]2[CrH5Mo6O24] ·5H2O (1) (phen = 1,10-phenanthroline), has been hydrothermally synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, IR spectrum, and thermal gravimetric analysis. Luminescent, electrochemical, and electroactivity properties of 1 have been studied.