A method of transmitting, by a base station, multicast and broadcast service, MBS, data in a wireless communication system, comprising: transmitting an allocation bitmap for indicating subbands allocated to one or more MBS zones from among a plurality of subbands included in a downlink frequency band; and transmitting the MBS data via at least one subband allocated to the one or more MBS zones, wherein the subbands allocated to the one or more MBS zones are subbands having the lowest indexes from among the plurality of subbands, and the method characterized in that: the allocation bitmap is configured with a same number of bits as that of the subbands allocated to the one or more MBS zones, each bit of the allocation bitmap corresponds to two adjacent subbands belonging to different MBS zones, two adjacent subbands belonging to a same MBS zone, or a last subband of the subbands allocated to the one or more MBS zones, the bit corresponding to two adjacent subbands belonging to different MBS zones is set to a 1 st value, the bit corresponding to two adjacent subbands belonging to a same MBS zone is set to a 2 nd value, and the bit corresponding to the last subband of the subbands allocated to the one or more MBS zones is set to the 1 st value, and the number of bits set to the 1 st value in the allocation bitmap is equal to the number of the one or more MBS zones. transmitting an allocation bitmap for indicating subbands allocated to one or more MBS zones from among a plurality of subbands included in a downlink frequency band; and transmitting the MBS data via at least one subband allocated to the one or more MBS zones, wherein the subbands allocated to the one or more MBS zones are subbands having the lowest indexes from among the plurality of subbands, and the method characterized in that: the allocation bitmap is configured with a same number of bits as that of the subbands allocated to the one or more MBS zones, each bit of the allocation bitmap corresponds to two adjacent subbands belonging to different MBS zones, two adjacent subbands belonging to a same MBS zone, or a last subband of the subbands allocated to the one or more MBS zones, the bit corresponding to two adjacent subbands belonging to different MBS zones is set to a 1 st value, the bit corresponding to two adjacent subbands belonging to a same MBS zone is set to a 2 nd value, and the bit corresponding to the last subband of the subbands allocated to the one or more MBS zones is set to the 1 st value, and the number of bits set to the 1 st value in the allocation bitmap is equal to the number of the one or more MBS zones. the allocation bitmap is configured with a same number of bits as that of the subbands allocated to the one or more MBS zones, each bit of the allocation bitmap corresponds to two adjacent subbands belonging to different MBS zones, two adjacent subbands belonging to a same MBS zone, or a last subband of the subbands allocated to the one or more MBS zones, the bit corresponding to two adjacent subbands belonging to different MBS zones is set to a 1 st value, the bit corresponding to two adjacent subbands belonging to a same MBS zone is set to a 2 nd value, and the bit corresponding to the last subband of the subbands allocated to the one or more MBS zones is set to the 1 st value, and the number of bits set to the 1 st value in the allocation bitmap is equal to the number of the one or more MBS zones.