"系统论方法" can be translated into English as "systems theory approach" or "systems approach".
"Systems theory approach" emphasizes the application of systems theory principles and concepts.
"Systems approach" is a more commonly used and concise term, referring to a holistic way of analyzing and solving problems by considering the entire system and its interrelationships, rather than just individual components.
Both expressions are acceptable, but "systems approach" is more frequently encountered in everyday usage and academic contexts.