A scanner device transmits scanned image data to a predetermined computer having a local area network transmit tool via a local area network. The scanner device includes a scanning module, a storage module, a determination module, and a control module. The scanning module scans a document waiting to be scanned to form an image data. The storage module stores the image data. The determination module determines an IP address of the predetermined computer. The control module transmits the image data to the predetermined computer via the local area network transmit tool based on the IP address of the predetermined computer.