Based on the literatures published on Web of Science and CNKI，this article applied the literature measurement method and knowledge map visualization technology in CiteSpace software，to make statistical analysis of the literatures that report functional genes of Orchidaceae from 2002 to 2020. We reviewed the exploration history and achievements on deciphering functional genes of Orchidaceae by national and international researchers in the past 19 years，and reported the characteristics such as the publication year，author and country information，journal co-citation analysis，knowledge base，hotspot keywords and research topics. Moreover，we further discussed the problems that remain to be solved and future research interests，thus providing theoretical supports in exploration，innovation and application of orchids in future.The results showed that the study of functional genes in Orchidaceae went through three stages （formation stage，growth stage and stable development stage），and the overall volume of publications showed a steady increase. Secondly，the research hotspots focused on the directions of speciation，transcriptomics，genetic transformation，ISSR and ITS molecular marker technology. The functional genes were mainly MADS-box，ACSs，MYBs and other genes，of which the MADS-box genes involved in regulating the development of flower organs were the most widely studied. Finally，a core group of authors has been formed，including Chen HW，Tsai WC，Tamura K，Liu ZJ，Zhu ZL，Cui B，Sun CB and Wu JS，but the cooperation between the teams is relatively dispersed.