A terminal for managing a bandwidth part in a wireless communication system is provided. The terminal includes a transceiver and at least one processor configured to receive, from a base station, a first radio resource control (RRC) message including a bandwidth part (BWP) configuration, receive, from the base station, downlink control information including a bitmap indicating whether each of at least one downlink (DL) BWP is activated as a first BWP or a second BWP, wherein the first BWP is configured with a non-dormant BWP in the first RRC message, and the second BWP is configured with a dormant BWP in the first RRC message, when a first bit of the bitmap is 0, determine an active DL BWP corresponding to the first bit as the second BWP, and when the first bit of the bitmap is 1, determine whether a current active DL BWP corresponding to the first bit is the second BWP, when the current active DL BWP is the second BWP, set the current active DL BWP to the first BWP, and when the current active DL BWP is not the second BWP, determine to maintain the current active DL BWP.