This application provides an in-vehicle gateway communication method, an in-vehicle gateway, and an intelligent vehicle. When receiving a first message from a first in-vehicle device, the in-vehicle gateway identifies identification information in the first message, and matches the identification information with preset identification information stored in the in-vehicle gateway, and only when the matching succeeds, the in-vehicle gateway sends a second message, to indicate, by using the second message, a second in-vehicle device to perform a target operation. However, when the identification information in the first message cannot match the preset identification information stored in the gateway, the in-vehicle gateway does not send the second information to control the second in-vehicle device to perform the target operation. Therefore, in this application, identification information of a first message is set in an in-vehicle gateway of a vehicle. This reduces a security threat to an in-vehicle network, and improves security performance of an in-vehicle network of a vehicle.