Provided is a method of transmitting, by a terminal, a hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook, the method including: obtaining HARQ-ACK feedback timing information and resource allocation information of a physical downlink shared channel (PDSCH); determining a number of PDSCHs that the terminal is to receive in one slot; determining an HARQ-ACK feedback bit to be included in an HARQ-ACK codebook, based on the HARQ-ACK feedback timing information and the resource allocation information of the PDSCH and information about the number of PDSCHs that the terminal is to receive in one slot; and transmitting the HARQ-ACK codebook including the determined HARQ-ACK feedback bit.