A network system including a service providing network device (ES1, ES2), an information processing device, and a data server; wherein: the data server is configured to be connectable to an image scanning device (SD1, SD2) via a network; the service providing device (ES1, ES2) is configured to transmit a web page to the information processing device, the web page comprising operating information for transmitting a command to the data server, the command being for causing an image scanning device (SD1, SD2) to execute a scanning operation and comprising location information indicating a location, in the network, of the service providing device (ES1, ES2); the service providing device (ES1, ES2) is operated by the information processing device via the web page transmitted from the service providing device (ES1, ES2); and the data server comprises: a processor having computer readable instruction stored thereon and configured to control the data server to execute steps of: receiving the command from the service providing device (ES1, ES2), based on operation of operating information in the web page, determining an image scanning device (SD1, SD2) to which an operation signal for executing an image scanning process is transmitted in response to receiving the command; transmitting the operation signal to the determined image scanning device (SD1, SD2) via the network to cause the determined image scanning device (SD1, SD2) to execute an image scanning process; storing scanned data obtained from the image scanning process of the determined image scanning device (SD1, SD2) in a memory at the data server; and transmitting, to the service providing device (ES1, ES2) indicated by the location information, the scanned data stored in the memory. the data server is configured to be connectable to an image scanning device (SD1, SD2) via a network; the service providing device (ES1, ES2) is configured to transmit a web page to the information processing device, the web page comprising operating information for transmitting a command to the data server, the command being for causing an image scanning device (SD1, SD2) to execute a scanning operation and comprising location information indicating a location, in the network, of the service providing device (ES1, ES2); the service providing device (ES1, ES2) is operated by the information processing device via the web page transmitted from the service providing device (ES1, ES2); and the data server comprises: a processor having computer readable instruction stored thereon and configured to control the data server to execute steps of: receiving the command from the service providing device (ES1, ES2), based on operation of operating information in the web page, determining an image scanning device (SD1, SD2) to which an operation signal for executing an image scanning process is transmitted in response to receiving the command; transmitting the operation signal to the determined image scanning device (SD1, SD2) via the network to cause the determined image scanning device (SD1, SD2) to execute an image scanning process; storing scanned data obtained from the image scanning process of the determined image scanning device (SD1, SD2) in a memory at the data server; and transmitting, to the service providing device (ES1, ES2) indicated by the location information, the scanned data stored in the memory. receiving the command from the service providing device (ES1, ES2), based on operation of operating information in the web page, determining an image scanning device (SD1, SD2) to which an operation signal for executing an image scanning process is transmitted in response to receiving the command; transmitting the operation signal to the determined image scanning device (SD1, SD2) via the network to cause the determined image scanning device (SD1, SD2) to execute an image scanning process; storing scanned data obtained from the image scanning process of the determined image scanning device (SD1, SD2) in a memory at the data server; and transmitting, to the service providing device (ES1, ES2) indicated by the location information, the scanned data stored in the memory.