This invention discloses an independent united radio resource managent system and a method based on intensified study, in which, when a re-configurable mobile terminal starts up a new session request, a radio re-configuration support function module collects the resource management information of isomeric radio access networks provided by a local resource manager, applies an intensified study mode to carry out attempted error interaction to decide if it accesses a new session immediately according to a related judgment rule and decides which network it accesses into and distributes related service bandwidth, otherwise, it refuses the session, then reports the united radio resource management deciding information to the re-configured manager.