The research over value on love，marriage and family of youths in Guangzhou，Hong Kong and Macao reveals that personality，moral character and value are considered as the most important standard to choose spouse. In Hong Kong，personality is prioritized；value is emphasized in Macao；and value is not paid much attention to by youths of Guangzhou. For youths in three regions，a family pattern of “one family，two children” is believed to be ideal. Besides，fertility desire is obviously affected by family economic conditions and social status. For attitude towards sex，tolerance for such problems as homosexuality，prostitution，abortion，divorce and premarital sex in Hong Kong and Macao is higher than Guangzhou. Domestic violence is hardly accepted by youths in three regions.