临床心理学起源于100年前莱特纳·威特默在宾夕法尼亚大学建立的第一个心理诊所,包括给学科提供名称及成立第一刊,他的作品在美国心理学的发展中处于领先的地位,并促进了特殊教育、学校心理学和应用心理学的发展,是美国心理学会的发起人之一。显然,他是心理学史上一个重要的人物,但关于他的传记资料却很少。本文总结了他的生平及其在临床心理学史上做出的开创性的贡献并简要分析了他被世人遗忘的原因。 Clinical Psychology, which originated 100 years ago, was the first psychiatric clinic established by Letner Witmer at the University of Pennsylvania. The first psychology clinic consists of providing the subject with the first name and setting up a subject. His work is leading the development of psychology in the United States , And promoted the development of special education, school psychology and applied psychology, and was one of the initiators of American Psychological Association. Obviously, he is an important figure in the history of psychology, but his biographical information is scarce. This article summarizes his life and his pioneering contributions to the history of clinical psychology and briefly analyzes why he was forgotten by the world.