This chapter provides a general introduction to autonomous driving systems, helping readers understand the classification of autonomous driving, clarify the differences between modular development and end-to-end learning development, and understand the application scenarios of autonomous driving. Section 1.1 introduces the classification of autonomous driving, Sect. 1.2 introduces the modular development structure, Sect. 1.3 introduces the less commonly used end-to-end development structure, Sect. 1.4 introduces the classification of autonomous driving implementation scenarios, Sect. 1.5 introduces the data loop, and finally, Sect. 1.6 gives an overview of Large Scale Model’s application in autonomous driving.