A resource management method, a resource management system and a resource manager are disclosed, and the method includes: acquiring a resource allocation request, where the resource allocation request carries a resource requirement list and an access domain name of an application requesting allocation of resources; searching for a resource index locally according to the resource requirement list, and acquiring addresses of at least two available resources, where the at least two available resources are located at different platform as a service layer devices, respectively, and the two available resources both satisfy the resource requirement of the resource requirement list; establishing a correspondence between an address of each available resource and the access domain name; and configuring at least two access routes according to the correspondence, where an access route is used for routing an access request accessing the access domain name to the available resource.