A network system includes a server and an apparatus connected to the server via a network. The server includes a connection information generation part configured to generate connection information including network connection information for a portable terminal connecting to the network and apparatus connection information including the IP address of the apparatus, and a connection information transmission part configured to transmit the connection information to the apparatus. The apparatus includes an image code display part configured to display an image code into which the connection information is converted, a request reception part configured to receive a job request specifying the IP address of the apparatus and transmitted from the portable terminal having decoded the image code and connected to the network using the network connection information, and a job execution part configured to execute a job based on the job request.