A method for planning sample points for surveying and mapping comprising: obtaining (Step 110) a photographing parameter of a photographing device carried by an unmanned aerial vehicle for surveying and mapping, the photographing parameter comprising a single-photo photographing area of the unmanned aerial vehicle for surveying and mapping at a set flight altitude, wherein the single-photo photographing area is equal to a ground pixel resolution multiplied by a frame size; determining (Step 120) a preset relative position relationship between each two photographing points in a combined photographing point set according to a preset photo overlap degree index and the single-photo photographing area, each photographing point corresponding to the single-photo photographing area, wherein the combined photographing point set comprises a central photographing point and four peripheral photographing points, the central photographing point is a center of a rectangle, the four peripheral photographing points are four vertices of the rectangle, such that a complete rectangle photo is obtained when photos taken at all photographing points are combined, and an overlap degree between a photo taken at the central photographing point and a photo taken at each peripheral photographing point is greater than that between two photos respectively taken at each two peripheral photographing points; the preset photo overlap degree index is a percentage of overlap between the photo taken at the central photographing point and the photo taken at each peripheral photographing point; and mapping (Step 130), according to information of the plot to be surveyed and mapped and the preset relative position relationship between each two photographing points in the combined photographing point set, each photographing point in the combined photographing point set to the plot to be surveyed and mapped, to serve as a sample point for surveying and mapping surveyed by the unmanned aerial vehicle for surveying and mapping at the set flight altitude in the plot to be surveyed and mapped, wherein the information of the plot to be surveyed and mapped comprises an area shape or an area size of the plot to be surveyed and mapped, each sample point is a position point, in the plot to be surveyed and mapped, at which the unmanned aerial vehicle performs surveying and mapping obtaining (Step 110) a photographing parameter of a photographing device carried by an unmanned aerial vehicle for surveying and mapping, the photographing parameter comprising a single-photo photographing area of the unmanned aerial vehicle for surveying and mapping at a set flight altitude, wherein the single-photo photographing area is equal to a ground pixel resolution multiplied by a frame size; determining (Step 120) a preset relative position relationship between each two photographing points in a combined photographing point set according to a preset photo overlap degree index and the single-photo photographing area, each photographing point corresponding to the single-photo photographing area, wherein the combined photographing point set comprises a central photographing point and four peripheral photographing points, the central photographing point is a center of a rectangle, the four peripheral photographing points are four vertices of the rectangle, such that a complete rectangle photo is obtained when photos taken at all photographing points are combined, and an overlap degree between a photo taken at the central photographing point and a photo taken at each peripheral photographing point is greater than that between two photos respectively taken at each two peripheral photographing points; the preset photo overlap degree index is a percentage of overlap between the photo taken at the central photographing point and the photo taken at each peripheral photographing point; and mapping (Step 130), according to information of the plot to be surveyed and mapped and the preset relative position relationship between each two photographing points in the combined photographing point set, each photographing point in the combined photographing point set to the plot to be surveyed and mapped, to serve as a sample point for surveying and mapping surveyed by the unmanned aerial vehicle for surveying and mapping at the set flight altitude in the plot to be surveyed and mapped, wherein the information of the plot to be surveyed and mapped comprises an area shape or an area size of the plot to be surveyed and mapped, each sample point is a position point, in the plot to be surveyed and mapped, at which the unmanned aerial vehicle performs surveying and mapping