The geometric structures and infrared spectra in the electronically excited state of a novel doubly hydrogen-bonded complex formed by Fluorenone and alcohols, which has been observed by infrared spectra in experimental study, are investigated by the time-dependent density functional theory (TDDFT) method.The geometric structures and infrared spectra in both ground state and the S1 state of this doubly hydrogen-bonded FN-2MeOH complex are calculated using the DFT and TDDFT methods, respectively.Two intermolecular hydrogen bonds are formed between FN and methanol molecules in the doubly hydrogen-bonded FN-2MeOH complex.