Embodiments of the present disclosure describe a troubleshooting method, apparatus, and system, and pertain to the field of troubleshooting. An embodiment of the method may include monitoring, by a virtualized network function (VNF), an operating status of at least one virtual machine (VM) inside the VNF. The method may also include determining, by the VNF according to a fault when the fault occurs on the VM, whether to perform VM rebuilding recovery. Furthermore the method may include sending, by the VNF, a rebuilding recovery request to a virtualized network function manager (VNFM) when determining to perform the VM rebuilding recovery. In this way, when the fault occurs on the VM, the VIM performs automatic rebuilding recovery for the VM by interactions between the VNFM and the VIM.