Virtual machine fault detection method

The invention discloses a fault detection method for a virtual machine. The server creates a virtual machine template according to the parameter configuration file and a preset normal desktop picture,and the terminal loads the virtual machine according to the virtual machine template. and the client loads the configuration file, compares the current desktop screen capture picture of the virtual machine with a preset normal picture to obtain comparison difference data, and transmits the comparison difference data and the desktop screen capture picture to a server, and the server judges whetherthe virtual machine is normal or not according to the comparison difference data and the desktop screen capture picture. Through the image histogram, the image equalization technology, the process detection and the socket data transmission, the desktop screenshot picture of the virtual machine is compared with the normal desktop picture, and whether the desktop of the virtual machine is normal ornot is judged according to