A server device, a client device and a dynamic image transmission method for a virtual desktop infrastructure are provided. The dynamic image transmission method for the virtual desktop infrastructure includes the following steps. A region information of a dynamic image displayed on a server device is detected by the server device. The region information is transmitted to a client device by the server device. The dynamic image is rendered on the client device according to the region information. The dynamic image is obtained from an Internet by the client device according to a network link information obtained from the server device, or the dynamic image is obtained by decompressing a compressed data provided from the server device.