This paper focuses on the application of intelligent technology in the cost management of construction engineering. It analyzes the adaptability between core technologies such as artificial intelligence

big data

Internet of Things and BIM and the needs of cost management such as precise accounting and dynamic control

and explores the specific application paths in each stage of pre-planning

design and bidding

construction process

and completion and operation and maintenance. Research shows that intelligent technology can break through bottlenecks such as low efficiency

delayed data and poor collaboration in traditional cost management

realizing precision

dynamism and intelligence of cost management.