A display method of an image, comprising: providing a display, wherein the display provides a first image, and the first image and an environmental scene are located within a field of view of a user, a first vergence plane where a plurality of sight lines of two eyes (1021, 1023) of the user converge is located at a first position when the user views the first image, and a second vergence plane where the plurality of sight lines of the two eyes (1021, 1023) converge is located at a second position when the user views an object in the environmental scene, wherein a first distance exists between the first position of the first vergence plane and the user, a second distance exists between the second position of the second vergence plane and the user, wherein the display comprises a first set of sub-pixels (Pxa, Pxb) and a second set of sub-pixels (Pxc, Pxd), and the first set of sub-pixels (Pxa, Pxb) are different from the second set of sub-pixels (Pxc, Pxd), wherein the first set of sub-pixels (Pxa, Pxb) provide a first set of light beams (La1, La2) to the two eyes (1021, 1023) and converge the two eyes (1021, 1023) at the first position located at a first vergence point, the second set of sub-pixels (Pxc, Pxd) provide a second set of light beams (La3, La4) to the two eyes (1021, 1023) and converge the two eyes (1021, 1023) at the first position located at a second vergence point, and the first vergence point is different from the second vergence point, wherein the first distance is adjusted when the first position of the first vergence plane is adjusted from the first vergence point to the second vergence point, and the first distance and the second distance satisfy a first relation: Dn < D1 < Df, wherein D1 represents the first distance, Dn = D2 + Δn, and Df = D2 + Δf, wherein D2 represents the second distance, Δn =(De / 2)* {tan[tan -1 (2*D2 / De) - δ]} - D2, and Δf = (De / 2)* {tan[tan -1 (2*D2 / De) +δ]} - D2, and wherein De represents a distance (De) between the two eyes (1021, 1023), δ represents an eye angular resolution of the two eyes (1021, 1023), and δ = 0.02 degrees. providing a display, wherein the display provides a first image, and the first image and an environmental scene are located within a field of view of a user, a first vergence plane where a plurality of sight lines of two eyes (1021, 1023) of the user converge is located at a first position when the user views the first image, and a second vergence plane where the plurality of sight lines of the two eyes (1021, 1023) converge is located at a second position when the user views an object in the environmental scene, wherein a first distance exists between the first position of the first vergence plane and the user, a second distance exists between the second position of the second vergence plane and the user, wherein the display comprises a first set of sub-pixels (Pxa, Pxb) and a second set of sub-pixels (Pxc, Pxd), and the first set of sub-pixels (Pxa, Pxb) are different from the second set of sub-pixels (Pxc, Pxd), wherein the first set of sub-pixels (Pxa, Pxb) provide a first set of light beams (La1, La2) to the two eyes (1021, 1023) and converge the two eyes (1021, 1023) at the first position located at a first vergence point, the second set of sub-pixels (Pxc, Pxd) provide a second set of light beams (La3, La4) to the two eyes (1021, 1023) and converge the two eyes (1021, 1023) at the first position located at a second vergence point, and the first vergence point is different from the second vergence point, wherein the first distance is adjusted when the first position of the first vergence plane is adjusted from the first vergence point to the second vergence point, and the first distance and the second distance satisfy a first relation: Dn < D1 < Df, wherein D1 represents the first distance, Dn = D2 + Δn, and Df = D2 + Δf, wherein D2 represents the second distance, Δn =(De / 2)* {tan[tan -1 (2*D2 / De) - δ]} - D2, and Δf = (De / 2)* {tan[tan -1 (2*D2 / De) +δ]} - D2, and wherein De represents a distance (De) between the two eyes (1021, 1023), δ represents an eye angular resolution of the two eyes (1021, 1023), and δ = 0.02 degrees.