An emergency power system for reserved firefighting power(EPS-F) is an firefighting and standby power generator. Since its rated output capacity is calculated based on the fire load, it has an advantage that its capacity is significantly reduced compared to a generator for the combined use for load and firefighting(combined load and firefighting generator). The feature of this type of generator is the control system consisting of a measuring device, control device and display. During a power outage, emergency power is supplied to the firefighting load and standby load simultaneously. However, when the system is overloaded, the standby load is cut off partially or entirely. This type of generator is applied based on the patented independent generator for reserved firefighting power. It is required that this system be applied safely and legally by comparing and analyzing a patent related to this generator.