An internet of vehicles message notification method, applied to a multi-access edge computing system, wherein the multi-access edge computing system comprises a first application instance, a second application instance, and an interworking service instance, the method comprising: receiving, by the first application instance, a notification message; sending, by the first application instance, the notification message to the interworking service instance; sending, by the interworking service instance, the notification message to the second application instance that subscribes to the message from the interworking service instance; and sending, by the second application instance, the notification message to an in-vehicle application served by the second application instance, characterized in that the multi-access edge computing system further comprises a service registry and discovery function module, and before the receiving, by the first application instance, a notification message, the method further comprises: registering, by the interworking service instance, with the service registry and discovery function; and sending, by the first application instance and the second application instance, a service discovery request to the service registry and discovery function, to request information of an internet of vehicles interworking service, wherein the request carries information of a geographical location served by the first application instance and the second application instance. receiving, by the first application instance, a notification message; sending, by the first application instance, the notification message to the interworking service instance; sending, by the interworking service instance, the notification message to the second application instance that subscribes to the message from the interworking service instance; and sending, by the second application instance, the notification message to an in-vehicle application served by the second application instance, characterized in that the multi-access edge computing system further comprises a service registry and discovery function module, and before the receiving, by the first application instance, a notification message, the method further comprises: registering, by the interworking service instance, with the service registry and discovery function; and sending, by the first application instance and the second application instance, a service discovery request to the service registry and discovery function, to request information of an internet of vehicles interworking service, wherein the request carries information of a geographical location served by the first application instance and the second application instance. registering, by the interworking service instance, with the service registry and discovery function; and sending, by the first application instance and the second application instance, a service discovery request to the service registry and discovery function, to request information of an internet of vehicles interworking service, wherein the request carries information of a geographical location served by the first application instance and the second application instance.