Multimedia control method and vehicle-mounted multimedia service system

The invention provides a multimedia control method and a vehicle-mounted multimedia service system, and the method comprises the steps: dividing a playing instruction into a first type of instruction which can be directly recognized and processed and a second type of instruction which cannot be directly recognized and processed based on the dimension of playing information contained in the playing instruction, and executing a training guide program when the playing instruction is the second type of instruction, guiding the user to re-train a local instruction analysis model and a local tuning model according to the second type of instruction, uploading re-training data of the local instruction analysis model and the local tuning model to a cloud training database, obtaining similar training data from the cloud training database according to the re-training data and in combination with a similarity judgment condition, and obtaining the similar training data from the cloud training database; and adding the simi