Autonomous lawn mowing system

An autonomous lawn mowing system comprising:

• a GPS receiver configured to acquire position information about a position of a self-propelled autonomous lawn mower;
• a moisture information acquirer including any one of a camera, a humidity sensor provided in the autonomous lawn mower, or a plurality of humidity sensors installed in a lawn, each configured to acquire moisture information about a moisture content of the lawn;
• a score storage that stores a table in which a classification of each working machines is associated with scores indicating characteristics of each working machine, the characteristics including at least one of the size of the working machine, whether or not the working machine has a blade, and a traveling speed;
• and
• a processor configured to:
• identify a wet land area based on the position information and the moisture information;
• prohibit or permit travel of the autonomous lawn mower in the identified wet land area based on a total score of the scores indicating the characteristics associated with the classification stored in the score storage corresponding to the autonomous lawn mower.