Abstract: With the advent of the era of big data, artificial intelligence (AI) has emerged and rapidly developed in the field of medicine. The application of AI has huge potential in achieving prompt and accurate analysis of tumor information aggregation. Moreover, AI can reflect the distribution of imaging data in the real environment by using key technologies, such as automatic image segmentation and extraction. Accordingly, tumor diagnosis can change from subjective perception into objective science. Therefore, AI can assist doctors in efficiently and accurately diagnosing the presence of tumors and providing a solid foundation for the formulation of an appropriate diagnosis plan and informed judgment of the prognosis. This paper reviews the key AI technologies and their current applications in tumor diagnosis.