<p>The present invention relates to a floating storage gas power which is provided to store liquefied natural gas in a marine floating structure and produce electricity using the liquefied natural gas. The floating storage gas power plant comprises: a cargo system storing liquefied natural gas in a floating structure, and loading and off-loading the liquefied natural gas; a fuel gas supply system installed on the floating structure to supply fuel gas by evaporating the liquefied gas of the cargo system into the fuel gas; and a gas turbine/engine power generation system including a gas power generation unit operated by fuel gas supplied from the fuel gas supply system, and a first generator producing electricity by the gas power generation unit.</p>
