Indentity problem has been constantly confronting Taiwanese people through various changes of regime. The current research studies the life of the anti-Japanese hero Chiu-ju Chen within the framework of life history. We will explore the defiant attitude of Mr. Chen in the face of the Japanese regime and why he finally reconciled and identified with Japanese. The analysis will be based on Erikson's identity theory and behavioral and social science. Chiu-ju Chen was a dissident who led the bandits in the mountainous areas in Northern Taiwan to fight against Japan in 1895. He was called a bandit chief by the Japanese, while the National Government called him a fighter against Japan. By exploring and analyzing the life stories of Mr. Chen, we aim to delve into the psychological state of Taiwanese people at the beginning of Japanese rule. Specifically, we will investigate the dilemma of life and death facing the Taiwanese colonists, their struggle against ethnic, political, cultural and personal identity with Japan, and their final reconciliation with Japan for practical reason. Chiu-ju Chen was born at Shenkheng, Taipei, at the Hsien-feng Period of Ching Dynasty. Mr. Chen had been a learned person since young and later became the governor-general of Shenkheng Village. Since the Chinese-French War, he had been recruiting his village comrades to defend the French invasion in Keelung and had won various battles. After Japan took over Taiwan, being reluctant to be ruled by the Japanese, Mr. Chen and his cousin Jie-sheng recruited volunteer soldiers and fought against the Japanese to restore Taipei. However, they failed and escaped to the mountain areas, thus beginning their life as guerrillas against Japan. The next year Mr. Chen and his cousin led the volunteer soldiers in a war to restore Dadao Cheng, Taipei. They failed again and ran back to the mountain areas and continued their life as anti-Japanese guerrillas. Due to their poor economic conditions, they sometimes had to rob local people and were thus regarded as bandits. Later, because of lack of support, they were reconciled with the Japanese. The Japanese ordered them to settle on Pei-yi Road and gave them the franchise of camphor. He thus became a wealthy man in his late life and often donated money for public benefit. However, he had always lived in depression and sullenness due to his failure to expel Japan. It has been shown in some documents that Dr. Sun Yat-sen had once met with Chiu-ju Chen and his cousin Jie-sheng at Tatao Cheng. This adds a legendary touch to Chen's life.