A mobile device, an image forming apparatus, a notification server and control methods thereof in which, when it is desired to connect the image forming apparatus with the mobile device, it may be directly network-connected with the mobile device using identification information of the mobile device. The mobile device includes a mobile device input unit to receive an image forming apparatus application install command, a mobile device communication unit to, if an image forming apparatus application is installed, send identification information of the mobile device to the notification server and receive product information of the image forming apparatus to be connected from the notification server, and a mobile device controller to, if the product information of the image forming apparatus is received from the notification server and a command for connection with the image forming apparatus is input, network-connect the mobile device with the image forming apparatus.