Monitoring method by terminal in wireless communication system supporting carrier aggregation and device for same

A monitoring method of a user equipment (UE) in a wireless communication system for supporting carrier aggregation, the method comprising:

• receiving information on a first resource period that is cross-carrier scheduled by a first cell, wherein the first cell comprises contiguous radio resource;
• blind-decoding on a first search space, in the first resource period, related to first control information on a physical downlink shared channel (PDSCH) of the second cell,
• wherein the blind-decoding on the first search space in a second resource period is skipped,
• wherein the first resource period comprises discontiguous radio resources of the second cell configured to be occupied by the UE, and
• wherein the second resource period comprises radio resources except for the first resource period;
• and
• blind-decoding on a second search space, in the second resource period, related to second control information on a PDSCH of the first cell,
• wherein an unused number of the blind-decoding, in the second resource period, on the first search space related to the first control information is configured to be used to detect information on the first resource period.