A portable information processor (10) includes a storage unit (11) that stores information; a connecting unit (12) that connects to one of the device (1 (or 2)); an information acquiring unit (13) that acquires information from the connected device (1 (or 2)); an operation information generating unit (14) supplied with a driving power from a power source of the connected device (1 (or 2)) and generating operation information relating to the predetermined operation executable by the connected device (1 (or 2)) based on device identification information and the acquired information acquired by the information acquiring unit (13), and the information stored in the storage unit (11); and a control unit (15) that controls the connected device (1 (or 2)) based on the operation information generated by the operation information generating unit (14).