Fuel cell, driven by hydrogen gas, has become a promising member as the source of alternative energy, but the lack of economic, efficient, endurable and safe on-board hydrogen storage system provides a task for technologists to put fuel-cell driven cars into the competitive position with traditional ones. A study on the characteristics and hydrogen adsorption criteria of MOF-5 was carried out. With little modification based on the published synthesis procedures, the newly synthesized MOF-5 exhibited Langmuir surface area above 4000 sq m/gm with dihydrogen uptake capacity ∼ 1.45 wt % ≤ 1 atm and 77 K. The material was hardly saturated and was expected to have more uptakes at the elevated level of pressure. It is the highest storage capacity ever reported by a crystalline microporous material at low pressure level. This is an abstract of a paper presented at the 2007 AIChE Annual Meeting (Salt Lake City, UT 11/4-9/2007).