中医系统论是基于中医学与系统科学的交叉研究而形成的现代理论，用于破解现代临床面临越来越多的多系统、多因素、多病机相关的复杂问题。本文系统阐述了中医系统论的有机性原理与功能性原理，指出有机性原理强调人体系统内外各要素之间的相互作用与整体关联，而功能性原理则揭示疾病从功能失调到结构改变的动态过程。以气血两虚型动眼神经麻痹为例，结合系统辨证脉学方法，分析了患者从气血耗损到脉络失养、最终导致眼部功能异常的过程流，探讨了功能A异常—结构异常—功能B异常的发病机制，治疗上强调以整体补益气血、调节功能A为核心，配合健脾祛湿、温经通络等治法，实现从整体到局部的功能修复。旨在展示中医系统论在解析复杂疾病机制、指导系统治疗方面的优势，为现代中医处理多系统、多因素复杂性疾病提供理论与临床参考。

Traditional Chinese medicine(TCM) system theory is a modern theory based on the crossdisciplinary research of TCM and system science,which is used to solve the increasingly complex problems related to multi-system,multi-factor,and multi-pathogenesis in modern clinical practice. This article systematically expounds the organic and functional principles of TCM system theory,pointing out that the organic principle emphasizes the interaction and overall correlation between various elements inside and outside the human body system,while the functional principle reveals the dynamic process of diseases from functional disorders to structural changes. This article takes oculomotor nerve palsy of “qi and blood deficiency” type as an example,combines the method of systematic sphygmology for pattern differentiation and analyzes the process flow of the patient from qi and blood depletion to loss of meridian nourishment and ultimately leading to abnormal ocular function. It explores the pathogenesis of abnormal function of A-structural abnormality-abnormal function of B,and emphasizes the core of overall tonification of qi and blood and regulation of function A in the treatment in combination with therapeutic methods such as strengthening the spleen and eliminating dampness,warming the meridians and unblocking the collaterals,it achieves functional repair from the overall to the local level. It aims to demonstrate the advantages of TCM systems theory in analyzing the mechanisms of complex diseases and guiding systematic treatment,providing theoretical and clinical references for modern TCM in dealing with complex diseases involving multiple systems and factors.