The invention discloses an infrared intelligent missed call reminding system and a using method thereof. The system comprises a mobile phone body, a mobile phone control chip and a missed call reminding module, wherein, the mobile phone control chip is connected with the missed call reminding module. The system also comprises at least one infrared sensor and an infrared detection control chip, wherein, the infrared sensor detects whether people exist around the mobile phone and is respectively arranged on at least one side edge of the mobile phone, and the side edge of the mobile phone body, which corresponds to the infrared sensor, is provided with an optical filter; the infrared detection control chip is respectively connected with the infrared sensor and the mobile phone control chip. The invention intelligently designs a system according to the situation that whether a user is near the mobile phone or not, which brings convenience for receiving missed calls and short messages timely, improves the function of effectively reminding missed calls and short messages, improves reminding effect and reduces mobile phone consumption, so that the system of the invention is a humanity design.