The invention provides a test and control method and system. The method comprises the steps that a service terminal receives a link establishment request message from a client and returns a link establishment response message to the client to establish a data link between the client and the service terminal; the service terminal receives a service registration request message transmitted by the client via a test and control functional interface and the data link, and returns a service registration response message to the client to access a test and control application of the client to test and control service in the service terminal; the test and control service in the service terminal receives signaling transmitted by the client via the test and control functional interface and the data link; the service terminal resolves the received signaling and maps the resolved signaling into a corresponding system application and a driving application; and the service terminal calls the system application and the driving application for test and control operation of equipment to be tested and transmits a test and control result to a message pool of the client. According to the method and the system, an additional functional interface is not required, all functions are mapped, and a test and control scope is extended.