To provide an apparatus control system to which a plurality of controllers capable of conducting an efficient maintenance and application are connected.

Apparatus control systems 1, 2 are provided wherein a plurality of controllers are provided according to a plurality of printers 10, 20, a plurality of controllers 1, 2 control respective printers 10, 20, and a data is mutually transferred between respective controllers 1, 2. The controllers 1, 2 are respectively equipped with first memories 1f, 2f for storing intrinsic data A necessary for control operation of the printers 10, 20, second memories 1f, 2f for storing intrinsic data B which are the data transferred from the other controller connected mutually, and necessary for control operation of the other controller, and interfaces 1e, 2e which transfer respective data A, B stored in first memories 1f, 2f and the second memories 1f, 2f to the other controller 2, 1 if necessary.