Psychoanalytic concepts have become an indispensable part of people’s daily life, which not only can help them better understand human behaviors and thoughts but also enable them to understand literary texts more accurately and clearly. Jacques Lacan’s psychoanalytic theory, Mirror Stage, gives a new perspective for texts. This paper will illustrate the detailed experiences about Jeannette Walls in The Glass Castle by three Orders of Lacan’s psychoanalytic theory, which can give enlightenment to the perplexed young people in the modern world.