This paper starts with the brief introduction to various methods of hydrogen storage, such as pressurized gaseous hydrogen storage, cryogenic liquefaction hydrogen storage, carbonaceous materials hydrogen storage, metal alloy hydrogen storage, complexation hydride hydrogen storage, glass microspheres hydrogen storage, liquid organic hydrogen storage, and so on. The corresponding principles of hydrogen storage were summarized with the analysis on advantages and disadvantages. Additionally, the characteristics of hydrogen storage with N-ethylcarbazole were profoundly discussed. The conditions and catalysts for hydrogenation and dehydrogenation (N-ethylcarbazole) were also analyzed at some length as well. According to the present situation of hydrogen storage with organic liquids, some ideas were put forward to get higher content and speed of absorbing and releasing hydrogen. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.