The metal complexes have been synthesized with the pyrazolone azo dye ligand 2-[ (5-hydroxy-3- methyl-1-(4-sulfophenyl)-1H-pyrazol-4-yl)diazenyl]benzene-1,4-disulfonic acid (HMSPDABDS) derived from aniline-2,5-disulfonic acid and 4-(5-hydroxy-3-methyl-1H-pyrazol-1-yl)benzene-1-sulfonic acid as a coupling compound by the diazotization reaction. The aniline-2,5-disulphonic acid diazonium salt solution reacts in solution with the pyrazolone coupler to form a coupling chemical. The metal complex was prepared using Cu(II) with azo dye ligand. The various spectroscopic methods, including UV-visible, ¹H NMR, and Fourier-transform infrared (FTIR), absorption, magnetic susceptibility, and molar conductance, were used to identify and validate the synthesized ligand structures. The mole ratio [M: L] of the complexes was studied and found to be 1:2. Checking the melting point of the ligand allowed researchers to study its physical characteristics. The creation of metal complexes under ideal conditions has been investigated. The prepared metal ion complexes were recognized using UV-visible and FT-IR spectra, and their biological activities were also checked.