1. A projection method, comprising: obtaining a first image, and obtaining an adjustment instruction, wherein the first image corresponds to first content; adjusting the first image to a second image according to the adjustment instruction, the second image comprising a target image corresponding to the first content; and projecting the second image; wherein when the second image is projected onto intersected planes formed by at least two planes, if an edge of the target image is intersected with an intersection line of the intersected planes, the edge of the target image is or is approximately perpendicular to the intersection line of the intersection planes.