This study systematically explores the refined strategies for construction management in building decoration and renovation projects, establishing a comprehensive management system that includes process control and quality assurance. By integrating BIM technology with intelligent tool development, the study achieved an improvement in construction quality compliance to 98.7%, a reduction in project delay rate to 1.2%, and a comprehensive cost savings of 12.7%. The “3D Standards + Five-Dimensional Monitoring” method proposed in the study effectively addresses the unique challenges of decoration projects. A total of 128 quality control points and dynamic early warning mechanisms form a replicable management paradigm, providing technical support for the industry’s implementation of the “14th Five-Year Plan for the Construction Industry.”