We established a two—step two—laser photolysis method, in which the first laser excited molecules to a lower triplet state and another sequential laser excited it resonantly to higher triplet states or make it ionization. The two—step two—laser method provides a novel way to study the electron transfer of excited molecules. The higher excited benzophenone and its radical cation were observed under the time—resolved absorption method when it was excited to lower triplet state by one laser and another one excited it to higher triplet states resonantly. The higher excited benzophenone molecules undergoing intermolecular hydrogen abstraction with iso—propylalcohol molecules was faster than the lower one. This two—step two—laser excitation method provides a new way to study selective excited biomolecules especially for DNA molecules.