There have been few articles on the sociological analysis of love. In this paper, it is tried to make framework of sociological analysis of love in with reference to ‘Sociology of Emotions’, and to understand the character of the love institution in modern society by using the fruits of Social History. It is understood that love is constructed subjectively by feeling rules regulating the relation between situations, desires to act, emotional words. And love is institutionalized by the several types of norms. In modern society, the love institutions are characterized by the enclosure in marriage.