Stephen Crane is one of the most famous American writers in late 19 th century, and his work of art The Red Badge of Courage is an important masterpiece of naturalism in American literary. With the background of American civil war and the depiction of Henry’s personal experiences and psychological changes durin the war, from inocence to maturation, the author reveals the war’s profound inflence on the charactr’s growth. In this novel, the description of war presents readers a bright war scene. It seems as if the novel is writing about war, in fact, it is exploring the relationship between human and environment, for environment can change a person’s action and mind completely. There is no doubt that The Red Badge of Courage is an excellent novel of war. Stephen Crane is one of the most famous American writers in the late 19th th century, and his work of art The Red Badge of Courage is an important masterpiece of naturalism in American literary. With the background of American civil war and the depiction of Henry’s personal experiences and psychological changes durin the war, from inence to maturation, the author reveals the war’s profound inflence on the charactr’s growth. In this novel, the description of war presents readers a bright war scene. It seems as if the novel is writing about war, in fact, it is exploring the relationship between human and environment, for environment can change a person’s action and mind completely. There is no doubt that The Red Badge of Courage is an excellent novel of war.