A method in a wireless communication system is disclosed. More particularly, the method comprises the steps of: detecting first downlink control information from a base station; and, on the basis of the first downlink control information, receiving from the base station second downlink control information comprising scheduling information for uplink data transmission or downlink data reception, wherein the first downlink control information comprises an indicator for indicating whether the scheduling information is scheduling information of a transmission block level or scheduling information of one or more code block levels comprising the transmission block.