A link condition announcement method employed by a wireless communication multi-link device, in the following also referred to as MLD, (102, 104), comprising: obtaining information of a traffic condition of each of a plurality of links, L 1 -L M, L 1 -L N, owned by the wireless communication MLD (102, 104) according to traffic statistics of said each of the plurality of links, L 1 -L M, L 1 -L N, where M and N are positive integers, N is not smaller than 2, and M is not smaller than N; transmitting the information of the traffic condition of said each of the plurality of links, L 1 -L M, L 1- L N, to another wireless communication MLD (102, 104) that communicates with the wireless communication MLD (102, 104) for choosing suitable links that can be associated with said wireless communication MLD, wherein the wireless communication MLD (102, 104) is an access point MLD, in the following also referred to as AP MLD,, and said another wireless communication MLD (102, 104) is a non-AP station MLD, in the following also referred to as non-AP MLD,, characterized in that: the traffic statistics of said each of the plurality of links, L 1 -L M, L 1 -L N, comprise latency statistics, the latency statistics are derived from overall latency, and said overall latency comprises queuing latency and channel access latency, wherein said channel access latency starts from an instant when a media access control service data unit, in the following also referred to as MSDU, enters an enhanced distributed channel access, in the following also referred to as EDCA, function and is ready to access a wireless medium, in the following also referred to as WM, and ends at an instant when the MSDU is sent out to the WM, and the instant when the MSDU is sent out to the WM is not confirmed as an effective end of the said channel access latency until an acknowledgment, in the following also referred to as ACK, frame indicative of successful transmission of the MSDU is received from said another wireless communication MLD (102, 104). obtaining information of a traffic condition of each of a plurality of links, L 1 -L M, L 1 -L N, owned by the wireless communication MLD (102, 104) according to traffic statistics of said each of the plurality of links, L 1 -L M, L 1 -L N, where M and N are positive integers, N is not smaller than 2, and M is not smaller than N; transmitting the information of the traffic condition of said each of the plurality of links, L 1 -L M, L 1- L N, to another wireless communication MLD (102, 104) that communicates with the wireless communication MLD (102, 104) for choosing suitable links that can be associated with said wireless communication MLD, wherein the wireless communication MLD (102, 104) is an access point MLD, in the following also referred to as AP MLD,, and said another wireless communication MLD (102, 104) is a non-AP station MLD, in the following also referred to as non-AP MLD,, characterized in that: the traffic statistics of said each of the plurality of links, L 1 -L M, L 1 -L N, comprise latency statistics, the latency statistics are derived from overall latency, and said overall latency comprises queuing latency and channel access latency, wherein said channel access latency starts from an instant when a media access control service data unit, in the following also referred to as MSDU, enters an enhanced distributed channel access, in the following also referred to as EDCA, function and is ready to access a wireless medium, in the following also referred to as WM, and ends at an instant when the MSDU is sent out to the WM, and the instant when the MSDU is sent out to the WM is not confirmed as an effective end of the said channel access latency until an acknowledgment, in the following also referred to as ACK, frame indicative of successful transmission of the MSDU is received from said another wireless communication MLD (102, 104). the traffic statistics of said each of the plurality of links, L 1 -L M, L 1 -L N, comprise latency statistics, the latency statistics are derived from overall latency, and said overall latency comprises queuing latency and channel access latency, wherein said channel access latency starts from an instant when a media access control service data unit, in the following also referred to as MSDU, enters an enhanced distributed channel access, in the following also referred to as EDCA, function and is ready to access a wireless medium, in the following also referred to as WM, and ends at an instant when the MSDU is sent out to the WM, and the instant when the MSDU is sent out to the WM is not confirmed as an effective end of the said channel access latency until an acknowledgment, in the following also referred to as ACK, frame indicative of successful transmission of the MSDU is received from said another wireless communication MLD (102, 104).