A smart control device, detachably mountable to a manufactured vehicle in a vehicle factory, may include a first connector configured to be coupled to an internal communication device in the vehicle including at least one communication protocol to be connected with at least one electric control unit (ECU); a second connector configured to be coupled to a gateway (GW) to establish communication between the at least one ECU and the gateway; a high-speed communication module configured to be connected to the first connector and the second connector and establishing external communication with a factory system; and a smart control module connected to the factory system through the high-speed communication module when receiving a mode designating signal which designates one work mode among a virtualization mode, a monitoring mode, and an update mode from the factory system and controlling the at least one ECU to perform the designated work mode.