Method and device for scheduling in wireless communication system supporting multi-connectivity

The disclosure relates to 5G or 6G communication system for supporting higher data transmission rates than 4G communication systems such as LTE systems. A method performed by a terminal in a wireless communication system includes receiving first information including configuration information related to cell groups, receiving second information related to an interface used for exchanging scheduling information between cells included in the cell groups, receiving, through a control channel of a first cell included in a first cell group among the cell groups, based on the second information, third information including scheduling information about a second cell included in a second cell group among the cell groups, wherein the first cell group is different from the second cell group, and performing a transmission/reception operation with a base station through a data channel of the second cell, based on the third information.