An adaptive region division method and system. The method comprises: building an environmental map on the basis of laser radar data and odometer data to determine information about an environment in which a target device is located (S11); performing feature extraction according to the laser radar data, so as to determine feature data, wherein the feature data comprises line feature data and point feature data (S12); generating a virtual door according to the feature data and the information about the environment in which the target device is located (S13); and dividing, according to the virtual door, a region to be divided where the target device is located (S14). Therefore, by generating a virtual door according to laser data of a current environment to achieve the purpose of adaptive region division, the target device can more efficiently and quickly cover the whole space.