File access control in a multi-protocol file server

Method for the invention can implements the file access control and using multiple access control mode and multiple file protocol server client device. Multi-protocol file the server and file with a specific access control mode and implements the specific access control mode to all visits of the file. When the file server receives the file's file server request, the access control limit to the file and conversion much limited limit in different mode. File server and a control and converting the access of client device. Equally distributed the ration to create the file and file or the file access control limit terminal the access control mode of user. Is provided with a user is access control limit of different access control mode; the access control mode of the file and changing the new mode. Organizes file according to the tree hierarchical structure, the trees limited to one or more access control mode.