Disclosed is a queue management device for providing information about an access waiting screen, and a method thereof. The device includes a communication unit that communicates with a client device and a target server, a memory in which at least one process for providing information to a waiting screen of the client device waiting to be accessed is stored, and a processor that operates according to the process. The processor provides waiting information of the client device to the waiting screen based on an access request previously received from another client device when receiving an access request for the target server from the client device through the communication unit, and provides additional service-related information to the waiting screen until the client device is allowed to access the target server.