Pollution source determination robot cleaner and operating method thereof

A robot cleaner comprising:

• a driver, including a drive motor, configured to cause the robot cleaner to move;
• a memory configured for storing information on a plurality of pollution maps corresponding to different time points in an event timeline for a degree of pollution for each location in a map corresponding to a place in which the robot cleaner is and/or was located;
• and
• at least one processor, comprising processing circuitry, operatively connected to the driver and the memory and configured to control the robot cleaner, and configured, individually and/or collectively, to:
• identify a pollution source based on the information on two or more pollution maps among the plurality of pollution maps related to a time point in the event timeline when a predetermined event occurs, and
• control the driver to move the robot cleaner based on the location of the identified pollution source on the map.