Spatial sampling method and device

The invention is suitable for the spatial sampling field, and provides a spatial sampling method and a spatial sampling device. The spatial sampling method comprises the following steps: dividing a total sample size into grids having the same size according to a predetermined dimension; determining the fractal dimensions of the divided grids; determining a sampling point number required to be extracted from various grids according to the determined fractal dimensions; determining the positions of the sample points according to the determined fractal dimensions of the grids and the determined sampling point number; and extracting related sampling points according to the determined sample point number and the sample point positions. The sampling unbiasedness can be guaranteed.