Abstract: Decreased cardiopulmonary function in lung cancer patients significantly negatively impacts survival and quality of life. The consensus presented herein was developed by a working group of the Cancer Assessment Society of China Anti-Cancer Association. It is built on evidence-based medicine and expert experience, and aims to standardize the comprehensive assessment of cardiopulmonary function in patients with lung cancer. This consensus defines the core components of comprehensive cardiopulmonary function assessment, emphasizing that assessment should be an integral part of all stages of lung cancer management. Core components include preoperative baseline assessment, early postoperative monitoring, dynamic tracking during radiotherapy, systemic medical therapy, and long-term follow-up. This consensus provides a standardized reference for the comprehensive assessment of cardiopulmonary function in patients with lung cancer, contributing to improved treatment tolerance, optimized therapeutic outcomes, and enhanced long-term prognoses.