Wang Xiaobo, a representative of the pro-reunification groups in Taiwan, was a professional in Chinese philosophy. Experiencing the "Defense of Diaoyu Islands," he developed anti-imperialist national thoughts and formed the political view of "peaceful reunification." In order to find a way out for Taiwan's future, he embarked on the road of studying the history of Japan-occupied Taiwan. Before martial law was lifted, Wang was mainly engaged in the anti-authoritarian democratic movement, taking the anti-Japanese history of Taiwan compatriots during the Japanese occupation period as its primary historical resource to correct the alienation of Taiwan's national identity. When Lee Teng-hui first took office in Taiwan, as the contradiction between unification and independence became the main contradiction in Taiwan society, "localization" gradually became the mainstream discourse in Taiwan society. Wang's discourse in this period, taking Straits Review Monthly as a battle field, mainly constructed the unification group's "localization" discourse to justify "localization" based on the anti-colonial movement. In 2004, when Chen Shui-bian took over Taiwan again, there were a series of new changes in Taiwan's social politics. In order to rebuild the power of reunification on the island, Wang focused his discussion on the construction of the internal connection among the Kuomintang, Taiwan and the motherland. Wang's related statements in the above-mentioned different periods highly echo the politics at that time, and are intended to compete with the Taiwan authorities for the right to interpret Taiwan's history, reshape the historical memory of Taiwanese, and promote democracy and the unification movement. This fully reflects Wang's characteristic of integrating academic research and political pursuit by discussing politics in light of history.