By analyzing the classic software development process, combined with the software architecture of the infotainment system, the vehicle development process and the development mode of this system, this article proposes a development method based on the division of system sections: The underlying software adopts the V model, middleware and system application software adopt the incremental development model, and ecosystem function software adopts a combination of the incremental and Scrum agile development models. This research content can provide some references for the process control methods of future in-vehicle infotainment system software development.