In response to the problems such as fragmented elements and out-of-control investment caused by the traditional project management centered on progress, this paper proposes that project management should evolve towards a model centered on investment control. By analyzing the traditional relationships of the core elements of project management, it reveals the deep mechanism of the disconnection between quality, safety, documentation, etc. and investment under the priority of schedule. Then, it constructs a theoretical framework with investment as the core hub and measurement and payment as the driving mechanism, and designs an implementation path to connect the five elements of quality, safety, schedule, materials, and documentation. Through the analysis in this paper, this model has achieved a triple transformation from the mindset of the contractor to that of the client, from passive control to active value creation, and from project delivery to asset appreciation. It is expected to provide a reference for the theoretical innovation and practical transformation of project management.