讨论了系统工程的特点 ,分析了岩土工程的学科系统是由多个学科组成 ,并且相互交叉和融合 ,具有系统工程的整体性、层次性、相关性、动态性等典型特点 ,提出了岩土工程的研究方法 ,即应用系统工程的原理和方法来进行研究 ,是岩土工程研究的最好方法 以三峡工程永久船闸陡高边坡为例 ,讨论了岩土工程的学科系统、研究内容、研究步骤 ,得出了几点结论 The characteristics of the system engineering are discussed. The disciplinary system of geotechnical engineering is composed of many disciplines, which are interdisciplined and integrated. They have the typical characteristics of system engineering, such as integrity, hierarchy, relativity and dynamics. The research method of geotechnical engineering, that is, applying the principle and method of system engineering, is the best way to study geotechnical engineering. Taking the steep and high slope of Permanent Ship Lock of Three Gorges Project as an example, the disciplinary system of geotechnical engineering is discussed. , Research steps, reached a few conclusions