Method and device for executing functions in application program

The invention relates to a method and device for executing functions in an application program and belongs to the technical field of electronics. The method comprises the steps of: obtaining first corresponding relationship between the functions and virtual interface information, which is pre-stored in a plug-in application program of a host application program and obtaining second corresponding relationship between the virtual interface information and interface information, which is pre-stored in the host application program; determining third corresponding relationship between the functionsand the interface information on the basis of the first corresponding relationship and the second corresponding relationship and storing the third corresponding relationship; and in the process of calling and running the plug-in application program through the host application program, when detecting an execution instruction of a target function, determining target interface information corresponding to the target functi