The invention discloses a password inputting method, a mobile terminal and a system. A user can freely switch the working state of a password input window of the mobile terminal through the control instruction of intelligent wearing equipment in the password inputting process, when the working state of the password input window is switched to be a password inputting state, password characters input into the password input window by a user in the password input state are acquired, and the password characters are stored; when the working state of the password input window is switched to be a scrambler input state, password characters input in the password input window by the user in the scrambler input state are regarded as invalid passwords, and the invalid passwords are abandoned. According to the method, the phenomenon that other people peep the passwords of the user is effectively avoided, the concealment is high when switching operation is conducted, the safety of password inputting is guaranteed, and the user can input the codes in a public area relievedly without worrying about privacy disclosure. In addition, according to the password inputting method, operation is convenient, and a user can command the method conveniently.