Method and device capable of providing official application program in application market

The invention discloses a method and a device capable of providing an official application program in an application market. The method includes the following steps of reading a digital signature and a packet name of an application program, looking for an official digital signature corresponding to the packet name in a preset data bank according to the packet name of the application program and judging that whether the digital signature of the application program is the same with the official digital signature corresponding to the packet name in the data bank or not, identifying the application program to be the official application program when the digital signature of the application program is the same with the official digital signature corresponding to the packet name in the data bank, and identifying the application program to be an unofficial application program when the digital signature of the application program is different from the official digital signature corresponding to the packet name in the data bank, adding an official sign to the official application program in the application market and displaying the official sign. A user can know whether the application program is the official application program or not before downloading instead of finding safety problems after being searched and killed by safe-defend software after downloading and setting up to know whether the application program is a safe application program or not. Time of the user is saved and information safety of the user is well protected.