郎尼根採用《洞察》中的認知理論為基礎，來發展他的《神學方法》。因此，本文首先介紹郎氏的認知理論，即經驗、理解、判斷和抉擇。其次，說明郎氏的神學方法，他描述八項專務：一、資料收集：與神學相關的資料；二、詮釋：理解資料的意義；三、歷史：研究傳統事件的時間、地點、人物和公開活動；換言之，去理解在時間中什麼是繼續的；四、辯證：將主體視野的衝突明朗化，並促成歸依；五、奠基：以歸依為先決條件，使主體生活在神的視野中；六、信理：表達對事實的判斷與價值的判斷；七、系統：處理信理中事實與價值的不一致，而達到內在的一致性；八、傳播：把信仰的訊息傳遞給他人。最後，針對郎氏的神學方法與阿奎納的神學方法進行比對，指出郎氏神學方法的繼承與創新之處。

Lonergan employs cognitional theory in Insight as a basis to develop his Method in Theology. Therefore, this paper first introduces Lonergan’s cognitional theory—experience, understanding, judgment, decision. Secondly, it illustrates Lonergan’s Method in Theology. Lonergan describes eight functional specialties. 1. Research: to collect the materials related to theology; 2. Interpretation: to understand the meaning of the materials; 3. History: to investigate the time, place, persons, and public events of the tradition, in other words to understand what is going forward in time; 4. Dialectic: to make the conflicts in a subject’s horizon explicit and to promote conversion; 5. Foundations: to make a subject live in God’s horizon based on the subject’s conversion as the prior condition; 6. Doctrines: to express judgments of fact and judgments of value; 7. Systematics: to deal with incoherence in the facts and the values in doctrines, in order to achieve an interior coherence; 8. Communication: to transmit the message of faith to others. Finally, it focuses on the comparison between Lonergan’s method in theology and Aquinas’ method in theology to understand tradition and innovation in Lonergan’s method in theology.