Abstract: Since GB/T 22723-2008 Energy Determination for Natural Gas was issued, a lot of laboratory researches and field tests have been developed as well as many scientific and technological achievements are acquired. Because a series of ISO and foreign advanced standards are not transformed so far, there are some flaws in our technological development of natural gas energy measurement system, such as establishing traceability guideline of natural gas analysis, evaluating measurement error and uncertainty for analysis system, and Monte-Carlo simulation for uncertainty evaluation. Four suggestions about technological development in future are presented.