Embodiments of the present disclosure relate to methods and apparatuses for downlink control information (DCI) transmission and receiving in a wireless communication system. A DCI configuration parameter can be first transmitted to a terminal device; and then DCI is transmitted to the terminal device, wherein the DCI configuration parameter indicates time-frequency resources for the DCI. With embodiments of the present disclosure, the UE could perform a flexible DCI monitoring according to the DCI configuration parameter and thus it may support the DCI monitoring occasion change due to numerology and scheduling unit size.