The target properties of our model are maximum oscillator strength and the corresponding excitation energy of a molecule. One of the most important properties to be a favorable fluorophore is high-intensity emission in the visible light range. However, the number of emission spectrum data is still not enough for applying deep-learning or other state-of-theart approaches. Additionally, the quantum calculation of emission spectrum is computationally more complicated than that of the absorption spectrum because the geometry optimization of excited states is less accurate than that of the ground state. Because the wavelength of absorption and emission are correlated in general, we used the absorption spectrum as a proxy of the emission spectrum.