As the reproductive organ of angiosperms， the flowers are a vital part of plants and a prime basis for the study of plant evolution andclassification. The development of the floral organ is affected by a variety of factors， such as the external environment and internal physiology， leading to different traits in different species or among the same species， and genes， as the key factors therein， play a vital role in the whole process， and the role of their genes in the regulation of floral development has been a hot topic of research. The five whorls of structures of the calyx， corolla， stamen， pistil， and ovule of the floral organ are regulated by five categories of genes， A， B， C， D， and E， in the AE model of floral development， and these genes form a complex gene regulatory network in the process of floral organ development. The expression or silencing of each category of genes leads to structural changes in the floral organs， but there are differences among different species. In this paper， we reviewed the regulatory roles of MADS-box， AP2/ERF gene family members AP1， AP2， AP3， PI， AG， SEP， AGL6， SHP， STK， and other genes such as NAP， SPL， TGA， PAN， and WOX in the construction of floral organs， and the effects of genes in the development of floral organs at the molecular level were analyzed. The influence of genes on floral organ development at the molecular level was also analyzed. This study provides a reference for further understanding the role of genes in the regulation of floral organ development in various plants.