Abstract: Through the implementation and application of fieldbus in huaneng luntai power plant, this article fully analyzes the difficulties in the fieldbus commissioning process from the aspects of management and technology under the current technology conditions. Specifically this article systematically puts forward the principle of the organization division of labor and the overall commissioning process in terms of management, while summarizes the difficulties encountered in the commissioning process from technical viewpoints. The study results will provide a systematic solution to the similar types of engineering applications under the circumstances of incomplete engineering commissioning standard.