The present invention can be continuously transferred to the LNG between the preload applied to the pipe and the storage tank to the transfer piping also a storage tank while being shipped or the unloading operation in progress by having for connecting the separately for loading and unloading of LNG which relates to a floating structure. According to the invention, to have a plurality of storage tanks for storing liquefied gas as a floating structure that is used as a floating state at sea, ship the liquefied gas in the storage tank to connect a plurality of the storage tank or cargo lading ever pipelines; The preload application ever pipeline and by connecting a plurality of the storage tank separately conveying pipeline for transferring the liquefied gas contained in the plurality of one storage tank of the storage tank to another storage tank; The floating structure is provided comprising a. Floating Structures, loading, unloading, transfer pipelines, membrane type storage tanks, storage tanks stand-alone, two-column layout, LNG FPSO