Disclosed is a new system and method for the “Content-level Reactive Presence Authorization”, wherein the Presentity would be able to reactively authorize the Watcher requested contents of the Presentity's Presence Information. According to the system and method for the Content-level Reactive Presence Authorization, it is possible for the Presence Server to convey the identity of the Watchers and the protected contents to the Presentity on the states of the Watcher's requested contents of the Presence Information. According to the systems and methods, it is also possible for Presentity to specify the conditions when the Presence Server triggers such Content-level Reactive Presence Authorization.