A one-way data transmission method is disclosed for transmitting a set of rules to data receiving apparatuses that each control a controlled apparatus. Also, a method is disclosed for controlling a controlled apparatus according to a specific rule and a specific parameter of the controlled apparatus, such specific rule being one of a set of rules provided for control over the predetermined kind of controlled apparatuses. Further, a transmission method is disclosed for transmitting a program including a set of rules to at least one reception side having plural kinds of controlled apparatuses, over a network, via a receiving device, or memory device. Further still, a reception method is disclosed for receiving a program including a set of rules on a reception side having plural kinds of controlled apparatuses through a network or memory device. The predetermined controlled apparatuses have a common, primary operation function but different specific parameters.