A charging system for an electric window covering, wherein the electric window covering comprises a motorized assembly, which controls a movement of the electric window covering, a rechargeable power supply device, and an electric power input, which is provided at a frame, and is coupled to the power supply device; the power supply device is coupled to the motorized assembly to provide power to the motorized assembly; whereby the charging system comprises a charging device, wherein the charging device comprises an extension object which has a stiffness, an electric power output, and a power storage device adapted to store an electric power therein, wherein the extension object is adapted to erect in a longitudinal direction thereof, and has a first connecting portion and a second connecting portion provided in the longitudinal direction thereof; the electric power output is provided near the first connecting portion; the power storage device is connected to the second connecting portion in a separable manner; the electric power output and the power storage device have an electrical conductivity therebetween, so that the power storage device is adapted to transmit the electric power to the electric power output; whereby the charging system further includes a first fixing structure and a second fixing structure, wherein the first fixing structure is connected to the extension object and is near the first connecting portion, and the second fixing structure is fixed to the frame, corresponding to the first fixing structure; whereby the first fixing structure includes an engaging portion (45, 45a, 45b, 45c, 45d), wherein the engaging portion (45, 45a, 45b, 45c, 45d) is connected to the first connecting portion, and is substantially perpendicular to the longitudinal direction of the extension object, so that the extension object and the engaging portion (45, 45a) substantially form a reversed "L" shape, and the electric power output is fixed at the engaging portion (45, 45a, 45b, 45c, 45d); whereby the second fixing structure includes a notch, wherein the notch is provided on the frame and is recessed into the frame, the positions of the notch and the electric power input corresponding to each other; such that the first fixing structure and the second fixing structure are combinable, and when the first fixing structure and the second fixing structure are combined, the charging device is firmly connected to the frame and hang therefrom without needing to be held by hand or by any kind of supporters during the charging procedure; the engaging portion fits into the notch; a relative position between the electric power output and the electric power input being maintained; providing electric power to the electric power input from the electric power output, to charge the rechargeable battery of the power supply device; and such that when the charging device is moved to make the engaging portion disengage from the notch, the charging device separates from the frame, and the first connecting portion of the extension object is away from the frame, whereby the electric power output no longer transmits the electric power to the electric power input, and the charging device stops charging.