A Digital Enhanced Cordless Telecommunications, DECT, network clustering method, comprising: sending, by a DECT host to a router, a multicast command that declares joining a specified multicast group; sending, by a DECT device to the router, a multicast probe message sent to a target multicast group; receiving, by the router, the multicast command and the multicast probe message, and sending, to the DECT host according to the multicast command, the multicast probe message of which the target multicast group is the specified multicast group; receiving, by the DECT host, the multicast probe message, and sending status declaration information to the DECT device in a point-to-point manner according to the multicast probe message; receiving, by the DECT device, the status declaration information, and initiating a Transmission Control Protocol, TCP, connection request to the DECT host in a point-to-point manner according to the status declaration information; and receiving, by the DECT host, the connection request from the DECT device, and establishing a TCP channel with the DECT device; characterized in that the multicast probe message comprises a first multicast group ID, a Media Access Control, MAC, address of the DECT device and a first verification feature code; the sending status declaration information to the DECT device in a point-to-point manner according to the multicast probe message comprises: sending the status declaration information to the DECT device in a point-to-point manner based on a User Datagram Protocol UDP, according to the MAC address of the multicast probe message after it is determined that the first multicast group ID is the same as a multicast group ID of the DECT host and the first verification feature code of the multicast probe message is verified; wherein the status declaration information comprises an IP address and a TCP listening port of the DECT host; the initiating a TCP protocol connection request to the DECT host in a point-to-point manner according to the status declaration information comprises: obtaining the IP address and the TCP listening port of the DECT host from the status declaration information, and initiating the TCP protocol connection request to the DECT host based on the IP address and the TCP listening port of the DECT host. sending, by a DECT host to a router, a multicast command that declares joining a specified multicast group; sending, by a DECT device to the router, a multicast probe message sent to a target multicast group; receiving, by the router, the multicast command and the multicast probe message, and sending, to the DECT host according to the multicast command, the multicast probe message of which the target multicast group is the specified multicast group; receiving, by the DECT host, the multicast probe message, and sending status declaration information to the DECT device in a point-to-point manner according to the multicast probe message; receiving, by the DECT device, the status declaration information, and initiating a Transmission Control Protocol, TCP, connection request to the DECT host in a point-to-point manner according to the status declaration information; and receiving, by the DECT host, the connection request from the DECT device, and establishing a TCP channel with the DECT device; characterized in that the multicast probe message comprises a first multicast group ID, a Media Access Control, MAC, address of the DECT device and a first verification feature code; the sending status declaration information to the DECT device in a point-to-point manner according to the multicast probe message comprises: sending the status declaration information to the DECT device in a point-to-point manner based on a User Datagram Protocol UDP, according to the MAC address of the multicast probe message after it is determined that the first multicast group ID is the same as a multicast group ID of the DECT host and the first verification feature code of the multicast probe message is verified; wherein the status declaration information comprises an IP address and a TCP listening port of the DECT host; the initiating a TCP protocol connection request to the DECT host in a point-to-point manner according to the status declaration information comprises: obtaining the IP address and the TCP listening port of the DECT host from the status declaration information, and initiating the TCP protocol connection request to the DECT host based on the IP address and the TCP listening port of the DECT host.