Until the middle and late 1980s, the study of attachment theory was mostly confined to the field of children's studies. Until 1987, with the participation of personality and social psychologists, the study of attachment was extended to the adult stage. A typical sign is that Hazan and Schaefer published a paper entitled "Romantic love can be regarded as an attachment process". They think that the three attachment types proposed by Ainsworth and others can also be applied to the process of adult love. Therefore, based on the infant attachment model described by ainsworth, they constructed a simple self-report scale. In this survey, subjects were asked to choose one of three descriptions of attachment types, which best reflected their feelings and thoughts in love. For example, a safe description is characterized by trusting each other and liking to be close, while an evasive description is characterized by lacking trust and liking to keep an emotional distance from each other. The typical characteristics of anxiety attachment type are lack of information about the emotional utility of lover and strong but unsatisfactory desire to be close to each other. Since then, the adult attachment scale has emerged continuously, which greatly promoted the research progress in this field.