Abstract: The natural gas is advantageous to its storage and transportation while existing as the liquid state, but the appearance that natural gas is utilized finally must be the gaseous state. So the liquefied natural gas must be vaporized first before utilizing. This article introduces the vaporization techniques of the liquefied natural gas and relevant contents. The liquefied natural gas needs to absorb a large amount of heat while vaporizing as the low-temperature fuel. LNG, this part of cold quantity, can be utilized effectively by other craft course. The application of LNG cold quantity is not included in the natural gas of gaseous state when used. On the basis of the thermodynamics analysis to LNG cold quantity, the authors present the cold quantity utilizing method in various kinds of techniques process, such as generating electricity, air separating, dry ice making, low temperature crushing and holding cold device.