Disclosed are a method and apparatus for scheduling a data channel to support a user equipment (UE) using various bandwidth parts (BWPs) in a next-generation/5G radio access network. According to one embodiment, a method may be provided for receiving a downlink (DL) data channel or transmitting an uplink (UL) data channel by a user equipment (UE). The method may include: receiving bandwidth part (BWP) setup information about a BWP set configured with one or more BWPs set up with regard to the UE from a base station (BS); and receiving DL control information (DCI) including information for indicating one among the one or more BWPs included in the BWP set configured by the BWP setup information from the BS, wherein a DL data channel is received or a UL data channel is transmitted through the one BWP indicated by the DCI.