A novel chromogenic and fluorogenic dye chemosensor was computationally designed using MO theory calculation and synthesized based on donor-p-acceptor unit. This prepared dye sensor showed the selective Ni(2+) metal ion sensing effects in optical properties with UV-vis absorption and fluorescence emission. Dye sensor displayed evident absorption changes with Ni(2+) ion and highly selective fluorescence quenching effect was determined. But it showed no significant changes upon the addition of other metal ions such as Cd(2+), Na(2+), Mg(2+), Pb(2+), Fe(2+), Fe(3+), Ca(2+), Cu(2+), Hg(2+) and Zn(2+)