Embodiments of the present invention disclose a network architecture implementing convergence of a small cell and an M2M system, a related method, and a related device. The network architecture includes: a small cell in a small cell system and an M2M platform device in an M2M system. The small cell is connected to a service interface of the M2M platform device by using a first interface, service data in the M2M system is transmitted between the small cell and the M2M platform device by using the first interface, and when the service data needs to be sent to a user terminal served by the small cell, the small cell sends the service data to the user terminal.