Ralph Weber’s recent criticism sheds light on the methodological predicament of comparative philosophy. I examine Weber’s analytical tool and argue that its general applicability and potential unbridled use can lead to a conflict between its own legitimacy and the legitimacy of comparative philosophy as an established sui generis sub-discipline of philosophy which largely functions as “intercultural” or “trans-cultural philosophy”. I defend the cultural approach, and argue that comparative philosophy should be viewed as philosophical data analysis from different spatiotemporal origins, in order to achieve better explanatory power for philosophical study. I point out that philosophy in China has its own peculiar methodological predicament. The comparative study of philosophy is a joint project of inter-cultural dialogue that rests on the collective effort of global participants.