The characteristics of the construction supply chain place a heightened emphasis on collaborative modes and agile adaptability in achieving supply chain resilience. As a result, supply chain collaboration management has emerged as a critical strategy for enhancing the resilience of the construction supply chain. With the advent of Industry 5.0, cross-organizational and cross-professional business integration should not solely focus on driving key elements towards goal alignment, but also address the significant challenges posed by knowledge heterogeneity in collaborative management of construction supply chains. Taking the procurement planning business, which is characterized by prominent cross-organizational and cross-professional issues, as an example, this paper aims to explore a planning collaboration method for knowledge heterogeneity through intelligent-assisted knowledge interoperability and human-centered platform operation. To accomplish this, we adopt a design science research methodology and analyze planning collaboration from two dimensions: process-oriented and event-oriented. Using enterprise data from a real-world case, we design a digital service construction method for business collaboration, covering the full spectrum from identification to construction to service operation. Finally, we outline our next steps for this research in terms of demonstration, evaluation, and communication improvement.