In order to find key nodes of the miRNA signature model regulating colorectal cancer 10 hub genes (ESR1, ADCY9, MEF2C, NRXN1, ADCY5, FGF2, KITLG, GATA1, GRIA1, KAT2B) were screened according to Cytoscape 3.6.1 and its plug-in (degree ranking of cytoHubba). The gene discussed is ADCY9; the disease is colorectal cancer.