目的:提高临床合理用药的水平,促进临床药学向更高层次发展。方法:举例、介绍、阐述系统思维方法及其整体性、动态性与最优化等原则对临床用药的指导作用。结果:系统思维方法有利于提高临床用药的科学性、准确性,保证用药的安全性、有效性和合理性。结论:临床医师和药师应学习运用系统思维方法。 Objective: To improve the level of clinical rational use of drugs to promote clinical pharmacy to a higher level of development. Methods: For example, introduce and explain the guiding thought of system thinking method and its principles of integrity, dynamics and optimization to clinical medication. Results: The systematic thinking method is helpful to improve the scientific and accuracy of clinical medication and ensure the safety, effectiveness and rationality of the medication. Conclusions: Clinicians and pharmacists should learn to use systematic thinking.