Method, system and device for realizing machine-to-machine service

The embodiment of the invention discloses a method for realizing a machine-to-machine (M2M) service. The method comprises the following steps: receiving an M2M service request sent by a source M2M business entity; judging whether the M2M service indicated by the M2M service request is allowed to perform according to resource scheduling information; and if yes, sending the M2M service request to the target M2M business entity according to target address information carried in the M2M service request. Correspondingly, the embodiment of the invention further discloses a system and a connection network for realizing the M2M service, thus effectively avoiding performing the M2M service in the case of larger network load, not affecting normal operation of other communication services while carrying out the M2M service, and improving the service quality of the M2M service correspondingly.