With the development of society, more and more people are paying attention to the quality of life of the elderly and those with chronic diseases, and the public has gradually realized the problem of drug interaction. However, according to the user survey and data access, the public's understanding of drug interactions is still insufficient and is not fully applicable to the daily means to avoid drug interactions. In this paper, according to the special needs of the elderly, an intelligent medicine cabinet is designed for people with long-term diseases. The smart drug kit USES infrared scanning of barcodes to obtain information and then processes the information through database to identify drug interactions.