1. A mobile robot, comprising: an image obtaining unit configured to obtain an image; a sensor unit configured to obtain driving information including at least a driving direction and a driving distance of the mobile robot; an image processing unit configured to process the image obtained by the image obtaining unit to extract a feature point and generate a descriptor for the feature point; and a main controller configured to generate a spatial map in a driving range based on the feature point and the driving information and control localization and navigation of the mobile robot, wherein when the localization and the navigation of the mobile robot are performed, depending on the matching degree of the obtained image and a reference image, the main controller selectively applies a first driving mode that simultaneously uses the image and the sensing information and a second driving mode that uses only the image information.