While the amount of renewable energy sources is rapidly increasing, a hydrogen energy storage system which can store energy for long term without loss is promising technology for supply-and-demand balancing of electric power and for absorption of surplus power. Furthermore, the hydrogen energy storage system is capable of storing a large amount of energy which will meet weekly or monthly energy demand by expanding the volume of hydrogen tank. Therefore, the hydrogen energy storage system can be applied to disaster application such as a Business Continuity Plan (BCP). In this paper, the operation and function of the hydrogen energy storage system combined with renewable energy is described using a BCP model and an island model. For the BCP model, a mini-model of photovoltaic (PV) and hydrogen energy storage combination system has been introduced to Hydrogen Energy Research & Development Center in Toshiba. In the island model which is regarded as a small community, power complement between two hydrogen energy storage systems that minimizes fuel consumption of the generator is proposed.