To quickly find deficiency in a control program for controlling processing equipment such as manufacturing equipment.

This information processor as a pseudo control object is connected to a controller operating according to a control program to be used. The pseudo control object simulatively operates according to an operation command from the controller, returns a response signal to the controller (S601 to S604), and displays to the effect that the control of manufacturing equipment (pseudo control object) by the control program violates prescribed restriction and its contents if the control of the manufacturing equipment (pseudo control object) by the control program violates the prescribed restriction (S606).