After several decades of assimilation policies under authoritarian ruling, do distinctions among the three Han ethnic groups (Min-Nan people, the Hakka, Waishengren) in Taiwan still exist in terms of social behaviours? This question is inevitable when authorities and educators rethink the meaning of multicultural education in Taiwan's context because multiculturalism is to face up the differences among ethnic groups and to respect and protect the values of ethnic groups. Employing data from World Values Surveys, this study shows significantly distinct social behaviours not only between the Han groups with the aborigines in Taiwan but also among the three Han ethnic groups in terms of implicit cultural-value. Multicultural education therefore is not only about the aboriginal culture but also about cultures of the three Han ethnic groups. Of course this also means that the government should face squarely, respect and safeguard the distinctions among the four ethnic groups to make Taiwan a truly multicultural society to keep up with the current trend in democratic societies.