The invention relates to a desktop system switching method for a virtual machine. The desktop system switching method comprises the step of verifying a received desktop switching instruction by using a bottom management system, wherein if verification succeeds, the switching instruction is executed; and if verification does not succeed, the switching instruction is not executed. By the desktop system switching method for the virtual machine, the desktop systems can be switched safely and reliably through the verifying process; the switching process is quick in response; the properties of the virtual machine system are not lost obviously; and better using experience is provided for users.