An amplifier selection device includes: a characteristic data storage configured to store a database including respective characteristic data of a plurality of motors, amplifiers, and common power sources; a motor selector configured to display a list of identification information of the motors and select a motor; an amplifier selector configured to display a list of identification information of the amplifiers and select an amplifier; a common power source selector configured to display a list of identification information of the common power sources and select a common power source; a display configured to display a combination of the motor, the amplifier, and the common power source; and a determiner configured to determine whether a relation of the characteristic data satisfies first and second conditions, and when at least one of the conditions is not satisfied, the display clarifies a combination which fails to satisfy the first or second condition.