A method and a system (6) for coordinating the use of telecommunications service providers (7). The method grants a service request submitted by a user (8) to a service provider (7) as a function of the current state of a state diagram of a unique environment of the user (8) and events associated with the service request. The coordination system (6) includes an access module (11), a profile manager module (13), a user agreement module 14 and at least one environment manager (15).