Human crying, a basic phenomenon of human life, is still an active field of medical research. Crying is deeply rooted in human culture, conveys negative and positive emotions, generates many interpretations. The first form of social communication is the social crying of infants. 0ur current scientific understanding ol crying and tears is rather fragmented, involving many disciplines, approaching it from completely different directions, thus lacking a unified picture. Psychodynamic theories see crying as a way to release emotional energy, while stress researchers see crying as a coping strategy. Attachment researchers emphasize the importance of crying as a way to maintain close relationships between individuals and caregivers, while evolutionary biologists emphasize the supposed role of tears in social bonding and in reducing aggression. Acoustic analysis of crying has entered a new era, where artificial intelligence provides tools for scientists to achieve deeper understanding between the physical characteristics of different crying patterns and human health state, and my serve information for health care industry to help families.  Kulcsszavak: infants' cry, artificial intelligence, acoustic analysis, review and perspectives