Abstract: An input device comprises a body, having an upper cover as well as a lower cover and a space formed between them for disposing an electronic circuit with a connecting interface; a meter, disposing in the body; and a control circuit, disposing in the space and coupling to the meter and the electronic circuit; whereby a human physiology parameter detected by the meter can be transmitted to a monitor program installed on a computer through the connecting interface. Wherein, the meter can be a temperature meter, a contact meter or an infrared meter, a blood pressure and heartbeat meter, a body fat meter or a skin analyzer, such that the input device of the present invention has the ability of measuring the temperature, blood pressure and heartbeat, body fat or skin quality of human being.