The present invention provides an operation triggering method and apparatus for machine-to-machine communications. The method implemented in a service capability middleware, includes retrieving a change result of the content of the subject resource stored in the service capability middleware; retrieving a representation of the operation resource associated with the subject resource, where the representation of the operation resource includes a condition for sending an operation request to an object resource and a uniform resource identifier of the object resource; constructing the operation request for the object resource when it is determined that the change result meets the condition for sending the operation request to the object resource in the representation of the operation resource; and sending the operation request to the object resource.