Virtual desktop client, control chip of virtual desktop client and method of controlling server device

This invention discloses a virtual desktop client that controls a server device and displays an operation screen corresponding to the server device on a display device. The virtual desktop client includes a network control module for receiving a remote image from the server device; an input driving module for driving an input device coupled to the virtual desktop client and generating input information by using the input device; and a control chip for drawing a pattern on the remote image according to the input information to generate a client-end image and displays the operation screen on the display device according to the client-end image. The control chip further generates control information, which relates to a position of the pattern, based on the input information and transmits the control information to the server device through the network control module.