The invention discloses a fine-grained permission management method and system for an Android advertisement bank. According to the method, a trained advertisement bank classifier is used to recognize an advertisement bank of a to-be-published application; a package name of the advertisement bank and a permission list of a module are written into a basic property list file of the to-be-published application; when the to-be-published application is installed, the basic property list file is analyzed, and advertisement bank information, permissions of the advertisement bank and permissions of a host application are recorded; when sensitive API calling occurs, a stack judgment permission is called through a recall function to check whether a trigger point is from the advertisement bank or the host application, and whether sensitive API calling is agreed or not is decided according to the permission list of the module; and the permissions of the host application and/or the permissions of the advertisement bank are given or rejected according to an instruction input by a user for managing the permissions of the host application and the permissions of the advertisement bank. Through the fine-grained permission management method and system, fine-grained permission management with higher operability and practicability on the Android advertisement bank compared with existing methods can be realized under the condition of not increasing overhead.