Engineering management refers to that engineering activities are not only controlled by engineering concepts, decision-making design, construction, organizational operation and other processes, but also related to the rational allocation of resources, materials, capital, human resources, land, environment and information and other elements. At the same time, a project often has multiple technologies, multiple schemes and multiple paths to be selected. How to effectively use various resources, get the maximum return with the minimum investment, and achieve comprehensive integration and multi-objective optimization under certain boundary conditions? Under the guidance of the correct concept, the project activities must be planned, organized, commanded, coordinated and controlled, that is, the project management.