Ultrafast internal conversion processes in isolated aromatic molecules were studied by time-resolved photoelectron imaging spectroscopy with 22-fs time-resolution. Visualization of speed and angular distribution of photoelectrons revealed non-adiabatic dynamics and vibrational wave packet motions in the excited states. We also succeeded in ultrafast photoelectron spectroscopy using liquid beams, which allows observation of non-adiabatic electronic dynamics in bulk solutions. Examples of electron transfer from halogen atom anion to polar protic solvents (water and alcohols) are presented.