For Raimon Pankikkar, pluralism and dialogical dialogue, though different in concept, are closely connected in practice. Seen from the deepest perspective, both are related to the nature of reality. On the one hand, reality is itself pluralistic; it cannot be reduced to a single system. On the other hand, this pluralistic world of reality, when facing its participants, nevertheless brings out a radical claim which seems very unreasonable: not to have nothing to do with one another, but to participate in dialogue. This article aims to investigate the relationship between Panikkar's idea of pluralism and that of dialogue. More correctly, it will elucidate the latter though an analysis of the former. The plan would be as follow: first, to summarize a brief account of the historic background of pluralism, then, to present Panikkar's theories on pluralism, and finally to underline some objections on Panikkar and to imagine how he would answer.