Abstract: During the trial operation and commissioning phase, Liquefied Natural Gas (LNG) terminals encounter significant challenges, including high commissioning costs, substantial material consumption, notable environmental impacts, and elevated safety risks. Taking the first-stage trial operation and commissioning of the Zhangzhou LNG Terminal Project (Phase Ⅰ) as a case study, innovative enhancements were implemented in the process flow. The joint commissioning of the Boil-Off Gas (BOG) recovery equipment was conducted in advance, and a "terminal–pipeline integrated commissioning" model was established, enabling the complete recovery and utilization of 7.7 million cubic meters of BOG. The pre-cooling strategy and key parameters for Storage Tank No. 2 were optimized, and improvements to the BOG recovery process and flow achieved "zero venting", resulting in a carbon emission reduction of 39, 700 tons of CO₂ equivalent. BOG was utilized for pre-cooling the unloading pipeline, with the average temperature drop maintained within 5 ℃ and the temperature difference between the upper and lower pipeline sections controlled within 10 ℃, significantly enhancing the pre-cooling effect. Practical validation demonstrates that these process improvements not only further reduce commissioning costs and enable recycling of commissioning materials, but also effectively mitigate environmental impacts and safety risks, offering valuable experience for the commissioning of other terminals.