A wireless control system for wirelessly collecting battery information of each of first to N th battery modules (20_1~20_N), the wireless control system comprising: a master configured to wirelessly broadcast a first command packet; and first to N th slaves (200_1~200 N) to which first to N th identifications (IDs) are allocated respectively, wherein the first slave (200_1) is configured to wirelessly broadcast a first response packet (RP_1) including first battery information indicating a condition of the first battery module (20_1) and the first ID, when the first slave (200_1) receives the first command packet, wherein the first to N th slaves (200_1~200 N) are positioned such that communication distances to the master are different to each other, a communication distance between a k th slave (200_k) among the first to N th slaves (200_1~200 N) and the master being shorter than a communication distance between a k+1 th slave (200_k+1) among the first to N th slaves (200_1~200_N) and the master, and wherein a rank of a k th ID of the k th slave (200_k) is higher than a rank of a k+1 th ID of the k+1 th slave (200_k+1), characterized in that: when the k+1 th slave (200_k+1) receives the first command packet, the k+1 th slave is configured to stand by to receive a k th response packet (RP_k) from the k th slave (200_k) having the k th ID of higher rank than the k+1 th ID for a k+1 th preparation period, and wirelessly broadcast a k+1 th response packet (RP_k+1) including k+1 th battery information indicating a condition of the k+1 th battery module (20_k+1) and the k+1 th ID, and when the k th response packet (RP_k) is received by the k+1 th slave (200_k+1) within the k+1 th preparation period, the k+1 th response packet (RP_k+1) further includes k th battery information indicating a condition of a k th battery module (20_k) and the k th ID, wherein N is a natural number of 2 or greater, and k is a natural number of 1 or greater and N-1 or smaller. a master configured to wirelessly broadcast a first command packet; and first to N th slaves (200_1~200 N) to which first to N th identifications (IDs) are allocated respectively, wherein the first slave (200_1) is configured to wirelessly broadcast a first response packet (RP_1) including first battery information indicating a condition of the first battery module (20_1) and the first ID, when the first slave (200_1) receives the first command packet, wherein the first to N th slaves (200_1~200 N) are positioned such that communication distances to the master are different to each other, a communication distance between a k th slave (200_k) among the first to N th slaves (200_1~200 N) and the master being shorter than a communication distance between a k+1 th slave (200_k+1) among the first to N th slaves (200_1~200_N) and the master, and wherein a rank of a k th ID of the k th slave (200_k) is higher than a rank of a k+1 th ID of the k+1 th slave (200_k+1), characterized in that: when the k+1 th slave (200_k+1) receives the first command packet, the k+1 th slave is configured to stand by to receive a k th response packet (RP_k) from the k th slave (200_k) having the k th ID of higher rank than the k+1 th ID for a k+1 th preparation period, and wirelessly broadcast a k+1 th response packet (RP_k+1) including k+1 th battery information indicating a condition of the k+1 th battery module (20_k+1) and the k+1 th ID, and when the k th response packet (RP_k) is received by the k+1 th slave (200_k+1) within the k+1 th preparation period, the k+1 th response packet (RP_k+1) further includes k th battery information indicating a condition of a k th battery module (20_k) and the k th ID, wherein N is a natural number of 2 or greater, and k is a natural number of 1 or greater and N-1 or smaller. when the k+1 th slave (200_k+1) receives the first command packet, the k+1 th slave is configured to stand by to receive a k th response packet (RP_k) from the k th slave (200_k) having the k th ID of higher rank than the k+1 th ID for a k+1 th preparation period, and wirelessly broadcast a k+1 th response packet (RP_k+1) including k+1 th battery information indicating a condition of the k+1 th battery module (20_k+1) and the k+1 th ID, and when the k th response packet (RP_k) is received by the k+1 th slave (200_k+1) within the k+1 th preparation period, the k+1 th response packet (RP_k+1) further includes k th battery information indicating a condition of a k th battery module (20_k) and the k th ID, wherein N is a natural number of 2 or greater, and k is a natural number of 1 or greater and N-1 or smaller.