Abstract: It has been shown in our previous paper that the natural logarithms of the ratios of excited to ground resonance structure counts should be correlated linearly with parameters related to transition energy. In the present paper, it is proved that such linear correlations are also well established with f luoran thenoid series ( |r|>0.95). Based on the judgement o.f regression analysis, the excited double bond resonance structures which emerged from the formal single bond inside the bridged five member ring, can not be included in the excited structure count for the ultra-violet excited state, but must be counted during the discussion of the excited state for polarographic reduction or oxidation. This phenomenon is consistent with that, relative to the ground state A, the excited state induced by ultra-violet light, polarographic reduction or oxidation corresponds to the really physical model of A^*,A^-, and A⁺ respectively. This fact provides an another evidence for the possibly real presence of the excited resonance structure set. A general method for the enumeration of ground and excited resonance structures is also proposed in this paper.