Disclosed is a system for liquefying hydrocarbon gas. The system for liquefying hydrocarbon gas pressurizes a first stream of evaporated gas generated from the evaporation of liquid hydrocarbon, and divides the first stream into a second stream and a third stream. By liquefying the third stream in a heat exchanger by heat-changing the third stream with the first stream, the evaporated hydrocarbon gas can be liquefied.
