A wearable electronic device, comprising: a body, comprising a display module, where a display area of the display module is on a surface of the body and is configured to output display contents; and a connector, having a first accommodating space, wherein when the body is fixed with the connector, the body is in the first accommodating space; the connector is capable of forming a wearing ring; when the first accommodating space is empty, the body is separated from the connector; a first communication module is arranged in the body and is configured for communication between the body and one or more first external devices, wherein the first communication module is further configured to establish a communication connection between the body and one of the one or more first external devices when the body is in a second accommodating space on the one of the one or more first external devices; and a second communication module is arranged in the connector and is independent of the first communication module, the second communication module being for communication between the connector and one or more second external devices, wherein the one or more second external devices are same as or different from the one or more first external devices; characterized in that the body further comprises: a first processing module, configured to switch the body from a first operating mode to a second operating mode after the body establishes the communication connection with the one of the one or more first external devices, and functions that the body can perform in the second operating mode is fewer than the number of functions that the body can perform in the first operating mode. a body, comprising a display module, where a display area of the display module is on a surface of the body and is configured to output display contents; and a connector, having a first accommodating space, wherein when the body is fixed with the connector, the body is in the first accommodating space; the connector is capable of forming a wearing ring; when the first accommodating space is empty, the body is separated from the connector; a first communication module is arranged in the body and is configured for communication between the body and one or more first external devices, wherein the first communication module is further configured to establish a communication connection between the body and one of the one or more first external devices when the body is in a second accommodating space on the one of the one or more first external devices; and a second communication module is arranged in the connector and is independent of the first communication module, the second communication module being for communication between the connector and one or more second external devices, wherein the one or more second external devices are same as or different from the one or more first external devices; characterized in that the body further comprises: a first processing module, configured to switch the body from a first operating mode to a second operating mode after the body establishes the communication connection with the one of the one or more first external devices, and functions that the body can perform in the second operating mode is fewer than the number of functions that the body can perform in the first operating mode.