The present invention firstly relates to an orienteering method used for an automatic driving device 1, especially used for a cleaning device for cleaning the floor, such as an automatic vacuum cleaner, an automatic cleaning machine, etc. The device 1 at least automatically maps and draws a total region G by the peripheral distance measurement. In order to improve the technical operations, the device 1 subsequently divides the total region G into a plurality of sub-regions (T1-T8) automatically. The present invention also relates to an orienteering method used for the automatic driving device 1, especially used for the cleaning device for cleaning the floor, such as the automatic vacuum cleaner, the automatic cleaning machine, etc. The device 1 at least automatically maps and draws a total region G by the peripheral distance measurement. In order to solve the above technical problems, the sub-regions (T1-T8) are divided automatically while mapping and drawing the total region G.