System for monitoring forest fires which supplies power through hybrid power generation, and method for monitoring forest fires

Provided is a system for monitoring forest fires which supplies power through hybrid power generation, and method for monitoring forest fires. A relay device for the system for monitoring forest fires includes: a sink node for collecting sensing information necessary for monitoring forest fires from a plurality of wireless sensor nodes; a transceiving device for transmitting the sensing information collected in the sink node to a control center; and a power supply unit for generating power by mixing different generated amounts of power and supplying the generated power to the sink node and to the transceiving device. Accordingly, due to the hybrid power generation, it becomes possible to supply power to the system for monitoring forest fires using another generator when one generator fails, such that stable power supply for the system for monitoring forest fires can be achieved, and an increase in power line costs and damage to the landscape can be prevented.