Embodiments of the present invention relate to an auxiliary method, apparatus, and system for diagnosing a failure of a virtual machine. An operation and maintenance system receives a failure message when a virtual machine fails; obtains running information of the virtual machine according to identifier information carried in the message, where the running information is used for diagnosing the failure of the virtual machine; generates graphic multi-dimensional display information of the virtual machine according to the running information; and sends the display information to a user end for displaying. The present invention provides an auxiliary method for diagnosing a failure of a virtual machine. The method may provide correlation analysis for diagnosing a failure of a virtual machine, allow the user end to diagnose the cause of the failure of the virtual machine in a comprehensive multi-dimensional manner, and improve the convenience and accuracy of diagnosing the virtual machine.