Portable information terminal and information processing method used in the same

A portable information terminal, comprising:

• a detecting sensor including at least one of a video input unit and a voice input unit;
• an output unit that outputs information;
• an information accumulating unit;
• and
• a control unit that detects a predetermined situation from a change in an input signal from the detecting sensor, detects a feature of a person from the signal detected by the detecting sensor, determines whether or not there is a person in which the feature of the detected person is similar to data accumulated in the past, newly accumulates information of the person in the information accumulating unit in a case in which there is no similar person as a result of the determination, updates the information of the person in the information accumulating unit in a case in which there is a similar person, and outputs the information of the person via the output unit.

An information processing method of a portable information terminal, comprising:

• an input step of detecting a change in surroundings;
• a transmission step of detecting a predetermined situation from a change in an input signal in the input step and transmitting an instruction signal to an external processing device;
• a reception step of receiving information of a person corresponding to the instruction signal from the external processing device;
• and
• an output step of outputting the information of the person obtained in the reception step.