Pc and TbPc might coexist on Pd(001) after double-decker TbPc2 dissociation. The TbPc2 will form a new (5×3) reconstruction on Pd(001) surface. The (5×3) reconstruction will be inherited after TbPc2 dissociation. The Tb-down is proved to be the stable status of TbPc on metal substrate.