The integration of Environmental, Social, and Governance (ESG) principles into organizational processes has become a critical challenge for firms seeking to align sustainability commitments with operational decision-making, regulatory compliance, and long-term value creation. Although Enterprise Resource Planning (ERP) systems represent core infrastructures for data integration, process standardization, and organizational memory, their role in supporting ESG integration remains fragmented and underexplored. This paper investigates how ESG principles and data can be integrated into ERP systems from a knowledge management perspective, with particular attention to the management of green knowledge. The study adopts a Systematic Literature Review (SLR), performed on Scopus, and collect 507 results. The findings, based on the resulting 29 pepers, show that ESG–ERP integration address specific technologies, indicators, sectors, or implementation issues, while limited attention is paid to how ESG-related data, practices, and responsibilities are transformed into structured, reusable, and actionable green knowledge within ERP systems. To address this gap, the paper proposes a research agenda organized around three dimensions: human, technological, and organizational. The paper also develops a set of best practices for knowledge-based ESG–ERP integration. These practices suggest that organizations should start from existing ERP processes, define shared ESG data meanings, embed ESG controls into workflows and decision-making, and support users through training, communication, and continuous learning. The study contributes to the literature by reframing ESG–ERP integration as a knowledge management process and provides practical guidance for organizations seeking to integrate sustainability principles into ERP systems in a gradual, coherent, and non-disruptive way.