The integration of information technology and construction engineering management enables computer, communication, automatic control and other information collection and processing technologies to transform and upgrade traditional construction methods, promotes the continuous improvement of construction engineering management technology and construction methods, and improves the efficiency of construction engineering management. The introduction of information technology into construction project management is an important guarantee to promote the modernization, scientific and informatization of construction project management. This article briefly describes the role of the integration of information technology and construction engineering. On this basis, it expounds the feasibility of multi-source information fusion technology in construction management. At the same time, it analyses many problems existing in information technology, and combines corresponding cases. Study the application of information technology in construction project management.