A method for planning a path of a working device includes: generating a polygon corresponding to a work area of the working device and generating an edge data structure based on the polygon; generating a survey area based on the polygon; generating a plurality of survey lines at a predetermined interval in the survey area; detecting at least one intersection between each of edges of the polygon and each of the plurality of survey lines based on the edge data structure; and generating the path of the working device in the work area based on the at least one intersection.