A virtual desktop implementation method, apparatus, and system are provided. A monitor program intercepts a file access request of an application program, and obtains file operation information of the file access request, where the file operation information includes a storage location and an operation type of a to-be-accessed file; the monitor program determines a file type of the to-be-accessed file according to the storage location of the to-be-accessed file, where the file type includes a system file and a program file; sends the file access request to a to-be-accessed file in a local virtual operating system folder when the file type is a system file; and sends the file access request to a to-be-accessed file in a program folder in a local or remote device when the file type is a program file. Accordingly running speeds of a virtual desktop and an application on the virtual desktop are improved.