Lung cancer (LC) is the most frequent type of cancer in the world. But the mechanism of LC is still largely unknown. In this study, we analyzed three lung cancer gene expression microarrays of different pathologic types to explore the potential candidate genes in LC by Integrated bioinformatical methods. 459 overlapped differentially expressed genes (DEGs) were explored in three GEO gene expression profiles of different pathologic types of lung cancer and function annotation of DEGs were performed. The main biological process of DEGs was regulation of vasculature development and angiogenesis. The most significant molecular function of DEGs was TGF-β receptor activity. The most significant Reactome pathway of DEGs was cell cycle and extracellular matrix organization pathway. The PPI network of the DEGs was constructed and 23 candidate hub genes were identified in the network . Kaplan-Meier survival analysis show 21 genes were associated with the prognosis of LC. The genetic alterations analysis of these genes by using cBioPortal shown ASPM has the highest genetic alteration rate of 9% in main pathological types of 3191 LC patients , CENPF has the second highest alteration rate of 6% in LC patients. ASPM and CENPF also identified have a significant co-occurrence relationship in LC, and the GO analysis shown they both participate in the regulation of cell cycle. In the TF -miRNA-gene network of 21 genes shown CENPF have the most significant value in the network and the most relevant TF are NFYA, E2F1 and MYC.In conclusion, this study explored several key genes about LC and analyzed potential TF of those genes, provides possible therapeutic targets and biomarker for further clinical application.