An intelligent agent system comprising terminal devices and, a control method are disclosed. The control method for the intelligent agent system comprises the steps of: transmitting, by a first terminal device, data including context information of a user to a server; storing, by the server, the received data in a user profile; receiving, by the second terminal device, the data including the context information of the recognized user from a server, when a second terminal device recognizes the user; and detecting, by the second terminal device, current context information of the user and recommending a service to the user on the basis of the detected current context information of the user, the received context information, and the characteristics of the second terminal device.