对弗洛伊德学说已有很多论述，亦有人承认“无意识”是其学说的理论核心。然而，时至今日，这一理论依然有许多模糊不清的地方。鉴于此，笔者从弗洛伊德早期心理结构理论，后期人格三部论的阐述和分析中，来理解和把握其“无意识”，以期更公允地评价弗洛伊德及其学说。 There have been many discourses on Freudian doctrine, while others have acknowledged that “unconsciousness” is the theoretical core of his doctrine. However, to this day, there are still many ambiguities in this theory. In view of this, the author comprehends and grasps its “unconsciousness” from the explanation and analysis of Freud’s theory of early psychological structure and the theory of the later personality, with a view to evaluating Freud and his theory with more fairness.