Controller and system construction method

The invention relates to a controller and a system construction method. A controller is communicable with a second controller, the controller comprising: a processing unit configured to execute a process to operate a first machine in cooperation with a second machine controlled by the second controller in real space; and a determination unit configured to determine whether the second controller controls a second machine operating in a real space or controls a virtual second machine simulating operation of the second machine in a virtual space, where the processing unit is configured to: in response to the determination unit determining that the second controller controls the virtual second machine, determine whether the second controller controls the virtual second machine; instead of controlling the second machine, modifying the process; and performing the modified process to operate the first machine in the real space in cooperation with the virtual second machine operating in the virtual space. 本公开涉及控制器和系统