From the aspects of family affection, emotional spirit and cultural cognition, this paper will try to analyze the protagonist’s growth, and explores the profound meaning of Search for Ego in Capote 's growth。 This paper includes three chapters。 Firstly, it will give a general introduction。 In chapter one, it will give a general analysis on this novel from the aspect of conceptual definitions。 Chapter two is the main body to exploring the profound meaning on the theme of Search for Ego from family affection, emotional spirit and cultural cognition。 Chapter three will give an analysis on the internal causes of the theme, including author’s social environment, family background and Personal Experience。 Finally, we will draw a conclusion at the end, and know that this kind of search in the protagonist’s growth will play a significant role both on protagonist and the author from the perspectives of discovering a real inner self, expressing their spiritual pursuit and the cultural orientation on southern culture。