A device virtualization method, apparatus and system, a device and a non-transitory computer-readable storage medium are disclosed. The device virtualization method may include: determining virtual information of a virtual device based on device information of a local device and device information of a peer device, the local device and the peer device are a plurality of first devices in a Multichassis Link Aggregation Group (MC-LAG), the device information comprises a bridge ID and a port ID, and the virtual information comprises a virtual bridge ID and a target port ID; switching an extended protocol message with the peer device; and determining a role and state of the port of the local device based on the virtual information and the extended protocol message of the peer device in combination with a protocol message received by the local device.