A liquefied gas regasification system and a method of operating the same, and, more particularly to a liquefied gas regasification system which can smoothly supply re-gasified liquefied gas to a gas consumer, and a method of operating the same are disclosed. The liquefied gas regasification system includes: a supply pump discharging liquefied gas from a liquefied gas storage tank; a high-pressure pump receiving liquefied gas from the liquefied gas storage tank and compressing the liquefied gas; and a fourth liquefied gas supply line connecting the supply pump to the high-pressure pump, wherein the supply pump is directly connected to the high-pressure pump through the fourth liquefied gas supply line, such that liquefied gas is directly supplied to the high-pressure pump by the supply pump.