系统神学（英语：Systematic theology，或称基督教系统神学）是基督教神学的分支，是对基督教信仰所作的有系统的反省、理解与陈述。

在公教神学中，系统神学可分为基础神学（关注信仰的基本前提）、教义学（关注信仰的内容）以及神学伦理学或道德神学或基督教社会理论（关注信仰对人类行动的后果）。在公教的理解中，基础神学被视为教义学的前序。而在新教神学中，系统神学一般分为教义学（关注上帝圣言）以及神学伦理学（关注基督徒行为）。

不同于**或犹太教等有神论的神学，基督教系统神学是持三一神观的神学。是以基督为中心的思考，故其独特的三一神观被视为基于基督的启示。系统神学研究对象及于信仰的全部，故不只是因基督而了解上帝，也因基督而了解人。不只是了解基督徒个人的信仰，也是了解基督所创建的教会。

Systematic theology is a discipline of Christian theology that formulates an orderly, rational, and coherent account of the Christian faith and beliefs. Subdisciplines are dogmatics, ethics and philosophy of religion.

Systematic theology draws on the foundational sacred texts of Christianity, while simultaneously investigating the development of Christian doctrine over the course of history, particularly through philosophy, science and ethics. Inherent to a system of theological thought is that a method is developed, one which can be applied both broadly and particularly. Using biblical texts, it attempts to compare and relate all of scripture and create a systematized statement on what the whole Bible says about particular issues. There are ten basic areas (or categories) of systematic theology; however, the exact list may vary slightly.