An image forming system, comprising: one or plural first class image forming apparatuses (3-i; 3-k; 3-p, 3-q) connected to a network; one or plural second class image forming apparatuses (4-j; 4-g, 4-h; 4-r, 4-s, 4-t) connected to the network; and a management server connected to the network; wherein each of the one or plural first class image forming apparatuses (3-i; 3-k; 3-p, 3-q) comprises a specific sensor that measures a specific device status, and automatically edits setting data on the basis of a measurement value of the specific sensor; each of the one or plural second class image forming apparatuses (4-j; 4-g, 4-h; 4-r, 4-s, 4-t) does not comprise a specific sensor that measures the specific device status; and the management server comprises: a machine group managing unit configured to set a machine group that includes (a) at least one of the one or plural first class image forming apparatuses (3-i; 3-k; 3-p, 3-q) and (b) at least one of the one or plural second class image forming apparatuses (4-j; 4-g, 4-h; 4-r, 4-s, 4-t); a sensor value collecting unit configured to collect a measurement value of the specific sensor from the first class image forming apparatus (3-i; 3-k; 3-p, 3-q) that belongs to the machine group; and a setting data applying unit configured to generate setting data for the second class image forming apparatus (4-j; 4-g, 4-h; 4-r, 4-s, 4-t) that belongs to the machine group on the basis of the collected measurement value, and apply the generated setting data to the second class image forming apparatus (4-j; 4-g, 4-h; 4-r, 4-s, 4-t), characterized in that, if the sensor value collecting unit detects that the first class image forming apparatus (3-i; 3-k; 3-p, 3-q) automatically edited the setting data, the sensor value collecting unit collects the measurement value from the first class image forming apparatus (3-i; 3-k; 3-p, 3-q) that belongs to the machine group to which the first class image forming apparatus (3-i; 3-k; 3-p, 3-q) that automatically edited the setting data belongs; and the setting data applying unit applies the generated setting data to the second class image forming apparatus (4-j; 4-g, 4-h; 4-r, 4-s, 4-t) that belongs to the machine group to which the first class image forming apparatus (3-i; 3-k; 3-p, 3-q) that automatically edited the setting data belongs. one or plural first class image forming apparatuses (3-i; 3-k; 3-p, 3-q) connected to a network; one or plural second class image forming apparatuses (4-j; 4-g, 4-h; 4-r, 4-s, 4-t) connected to the network; and a management server connected to the network; a machine group managing unit configured to set a machine group that includes (a) at least one of the one or plural first class image forming apparatuses (3-i; 3-k; 3-p, 3-q) and (b) at least one of the one or plural second class image forming apparatuses (4-j; 4-g, 4-h; 4-r, 4-s, 4-t); a sensor value collecting unit configured to collect a measurement value of the specific sensor from the first class image forming apparatus (3-i; 3-k; 3-p, 3-q) that belongs to the machine group; and a setting data applying unit configured to generate setting data for the second class image forming apparatus (4-j; 4-g, 4-h; 4-r, 4-s, 4-t) that belongs to the machine group on the basis of the collected measurement value, and apply the generated setting data to the second class image forming apparatus (4-j; 4-g, 4-h; 4-r, 4-s, 4-t), characterized in that,