Mobile terminal, and system and method for quickly photographing mobile terminal

The invention relates to a mobile terminal, and a system and a method for quickly photographing the mobile terminal. The system comprises a mobile phone original photographing system and also comprises a hardware detection key sequence, wherein the hardware detection key sequence is suitable for any terminal with the photographing function; and when a user triggers the key sequence to start the fast photographing function, the ordinary photographing function of the mobile terminal is not affected. The invention provides a fast photographing function of the mobile terminal, so that the user can quickly record certain instant details, thereby the time of the user is saved, and the user experience is improved.