1. A depth processing method for an electronic device, the depth processing method comprising: obtaining a color image and a depth map corresponding to the color image; extracting a plurality of regions from at least one of the depth map and the color image; obtaining region information of the regions, and classifying the regions into at least one of a region-of-interest and a non-region-of-interest according to the region information, wherein the region information comprises area information and edge information; and adjusting a plurality of depth values in the depth map according to the region information, wherein the regions comprises a plurality of color regions and a plurality of depth regions, the depth regions are obtained from the depth map, and a first color region of the color regions corresponds to a first depth region of the depth regions, wherein the step of adjusting the depth values in the depth map according to the region information comprises: performing an erosion procedure on the first depth region to obtain a first boundary; performing a dilation procedure on the first depth region to obtain a second boundary; and mapping the first boundary and the second boundary into the color image, and performing a segmentation algorithm in an area between the first boundary and the second boundary in the color image for adjusting a contour of the first depth region.