This section mainly interprets the development trend of OTA for intelligent and connected vehicles. First of all，the traditional software update and OTA software upgrade are compared，which shows that OTA have the advantages of high efficiency，convenience and flexibility，and low cost，but they introduce new security risks and require more perfect security measures. The development status，technical evaluation and operation process of intelligent networked vehicle OTA at home and abroad are introduced，and the OTA of intelligent networked vehicles at home and abroad has been fully implemented，and its development and implementation are driven by regulations，and have entered the era of compliance with regulations from compliance with standards，and run through the whole life cycle of automobiles. At the technical level，the OTA technology of intelligent and connected vehicles is sorted out，and the existing industry technical standards are summarized，including industry alliance standards，ISO standards，national standards，etc. Finally，the development of OTA technology and the application status and development trend of the OTA market were analyzed and prospected，OTA technology is being continuously applied to new cars by major car companies，and car remote upgrade has become one of the most important core technologies in the automotive industry.