SOA is a software application architecture method, which is based on object-oriented, but not object-oriented, and is a service-oriented architecture as a whole. SOA consists of a set of architectural methods formed by precise service definition, loose component services and business process invocation.

SOA architecture is a coarse-grained, open and loosely coupled service structure, which requires layered development of vehicle software according to relevant standards or protocols.

Through this hierarchical design or architecture system, vehicle-mounted software can become more flexible and compatible with third-party vehicle-mounted software as much as possible, so as to achieve rapid expansion and meet or respond to the diversification and variability of market or customer needs.

SOA is a typical architecture of IT industry in recent years, and a large number of IT systems are implemented based on SOA. One of the main reasons for adopting SOA architecture in the automotive field is to speed up the interconnection between vehicles and the Internet.

It can greatly improve the automatic driving function, facilitate the creation, update and route prediction of high-definition maps, facilitate the uploading of vehicle information and the release of cloud instructions, and quickly improve the upgrade performance of systems and software.

SOA has higher usability, which is reflected in the loose coupling relationship between service providers and service consumers. Users do not need to know the details of the provider's implementation. Therefore, SOA architecture now appears more and more in cars.