Provided are a hardware device and a method for creating and managing socket information serving as a connection with a network protocol hierarchy in a network application program. The hardware device includes a TCP transmission processor for processing commands on requests for creating and eliminating a socket of a predetermined network program in response to the requests for creating and eliminating a socket, a TCP reception processor for creating a search signal for a corresponding socket identification when a new packet is received, a socket management unit for creating and eliminating a socket ID upon a command from the TCP transmission processor, and searching the socket ID and providing the socket ID to the TCP transmission processor upon a command from the TCP reception processor, and a memory unit for storing the socket information, and providing the socket information to the TCP reception processor.