An operating method of a control device in a network function virtualization, NFV, environment, comprising: determining a virtual compute node corresponding to a server device; identifying physical layer information related to the server device, and virtual layer information related to the virtual compute node; displaying the physical layer information and the virtual layer information; and examining a malfunction in a virtual layer to detect a malfunction in at least one virtual machine, VM, which operates in the virtual compute node; wherein association between the physical layer information and the virtual layer information is used to manage quality of service, QoS, in the NFV environment, wherein the physical layer information comprises information on at least one physical port disposed in the server device, and the at least one physical port includes a first physical port and a second physical port, in case that a malfunction is not detected in the virtual layer, examining a malfunction in a server device associated with the virtual layer and the first physical port of the server device, in case that a malfunction is not detected in the server device and the first physical port, examining a malfunction in a switch connected to the first physical port of the server device and a port of the switch, in case that a malfunction is not detected in the switch and the port of the switch, determining no malfunction is occurred in an infrastructure and a service, and displaying that it is necessary to examine a software running on the at least one VM, in case that a malfunction is detected in at least one of the virtual layer, the server device, the first physical port, the switch, and the port of the switch, displaying information indicating the malfunction of the at least one VM, information indicating the server device including the first physical port corresponding to the at least one VM, information of the switch connected to the first physical port, and virtual layer information related to the at least one VM, in case that a malfunction is detected in the first physical port and a sum of traffic usage of the at least one VM exceeds a link speed supported by the second physical port of the server device, notifying through a user interface that the first physical port is down. determining a virtual compute node corresponding to a server device; identifying physical layer information related to the server device, and virtual layer information related to the virtual compute node; displaying the physical layer information and the virtual layer information; and examining a malfunction in a virtual layer to detect a malfunction in at least one virtual machine, VM, which operates in the virtual compute node; wherein association between the physical layer information and the virtual layer information is used to manage quality of service, QoS, in the NFV environment, wherein the physical layer information comprises information on at least one physical port disposed in the server device, and the at least one physical port includes a first physical port and a second physical port, in case that a malfunction is not detected in the virtual layer, examining a malfunction in a server device associated with the virtual layer and the first physical port of the server device, in case that a malfunction is not detected in the server device and the first physical port, examining a malfunction in a switch connected to the first physical port of the server device and a port of the switch, in case that a malfunction is not detected in the switch and the port of the switch, determining no malfunction is occurred in an infrastructure and a service, and displaying that it is necessary to examine a software running on the at least one VM, in case that a malfunction is detected in at least one of the virtual layer, the server device, the first physical port, the switch, and the port of the switch, displaying information indicating the malfunction of the at least one VM, information indicating the server device including the first physical port corresponding to the at least one VM, information of the switch connected to the first physical port, and virtual layer information related to the at least one VM, in case that a malfunction is detected in the first physical port and a sum of traffic usage of the at least one VM exceeds a link speed supported by the second physical port of the server device, notifying through a user interface that the first physical port is down.