The invention relates to a method for obtaining information in a lost mobile communication terminal. The method for obtaining information in the lost mobile communication terminal comprises the following steps of: judging whether parameters of a current SIM (subscriber identity module) card are in line with data of an SIM card stored in an internal storage of the mobile terminal when the mobile communication terminal starts work, if so, executing a normal startup program, and if not, executing a next step; carrying out user authentication, judging whether a user is a set legitimate user, if so, executing a startup program, and if not, executing a next step; obtaining information at an assigned storage position in a nonvolatile internal storage of the mobile communication terminal; and sending the information to the mobile communication terminal setting a number and receiving the short message when the mobile terminal normally works in a mode of short message. The invention also relates to a method for realizing the method. The method and the device for obtaining information in the lost mobile communication terminal, disclosed by the invention, have the advantage that the obtainment of the information in the lost mobile communication terminal is realized.