Image forming system

An image forming system comprising:

• an image forming apparatus configured to form an image on a. recording medium;
• and
• a mobile terminal configured to communicate with the image forming apparatus through a communication network, wherein
• mode information is inputted to the image forming apparatus from an external device,
• the mode information indicates one mode among a quiet mode in which the image is formed at a predetermined formation speed, a normal mode in which the image is formed at a faster formation speed than the quiet mode, and an urgent mode in which an image formation process in the quiet mode or the normal mode is interrupted to form the image,
• the quiet mode is sellable on the mobile terminal, and
• the image forming apparatus forms the image in the urgent mode when the mode information inputted from the external device indicates the urgent mode and setting information indicating the quiet mode is acquired from the mobile terminal.