Abstract: A control system includes a control target and plural devices, and the control target and the devices are connected to a network. The control system includes a program storage provided in each device storing a control program that calculates control data using data exchanged with the control target, an execution module and a disposition module. The execution module is included in each device and causes a processor to execute programs including a disposed control program. The disposition module disposes control programs in one or more of the devices. The disposition module determines a device in which the control program is disposed from among the plural devices based on a communication delay time between the devices and information about a resource usable for execution of the control program of each device for each control program.