To easily and automatically control external equipment suited to the preference of a user without being accompanied by troublesome input work to a computer.

This control method for making the computer 1 execute the operation control of the external equipment 2 data-communicably connected to the computer is provided with a history registration procedure for registering operation conditions outputted from the external equipment 2 as an operation history, a decision procedure for deciding the standard operation of the external equipment based on the registered operation history, a comparison procedure for comparing and judging the operation condition of the external equipment at the point of time and the decided standard operation and a shift output procedure for outputting an instruction for shifting the external equipment to the operation condition pertinent to the standard operation in the case that judgment in the comparison procedure is that they are different.