The pipeline buoyance control analysis has received increasing attention in natural gas pipeline engineering recently. On the basis of the analysis of buoyance control method in domestic natural gas pipeline engineering, the buoyance control method in Australian natural gas pipeline engineering is introduced. Through the contrastive analysis for these two methods, the buoyance control method of Australian natural gas pipeline engineering is applied according to the data of certain natural gas gathering project in Australia. The result shows that the domestic buoyance control analysis is conservative comparatively. The actual engineering situation can be better reflected by using Australian natural gas pipeline buoyance control method.