In the network topology analysis, the active ingredients of ginseng leaves have a greater possibility of acting on the immune regulation of lung cancer through HSP90AA1, JUN, STAT3 EGFR, MYC, VEGFA, CCND1, TNF, MAPK1, AKT1, RELA, CDKN1A, IL1B, IL2 and TP53. The gene discussed is IL2; the disease is lung cancer.